Psoriasis

Key Takeaways

• Psoriasis is a chronic inflammatory skin disease that causes skin cells to turn over too quickly, leading to thick, scaly plaques, itching, and inflammation.

• Psoriasis can look different on deeper skin tones. Instead of the classic salmon-pink plaques often shown in textbooks, psoriasis in skin of color may look violaceous, gray, dark brown, or bluish.

• People with skin of color are more likely to experience delayed diagnosis and lingering pigment changes. Dark spots or light spots can remain for months after plaques improve.

• Psoriasis is more than a skin condition. It can affect the nails, scalp, and joints, and it is linked to psoriatic arthritis, depression, anxiety, obesity, diabetes, and cardiovascular disease.

• Treatment depends on severity and body location. Mild psoriasis may be treated with topical medications, while moderate-to-severe disease may require phototherapy, oral medication, or biologic treatment.

• If you have persistent scaly patches, scalp flaking that is not improving, nail changes, or joint pain, it is worth seeing a dermatologist. Early diagnosis matters, especially in skin of color, where psoriasis is more likely to be missed or undertreated.

What Is Psoriasis?

Psoriasis is a chronic inflammatory skin disease caused by an overactive immune system. In psoriasis, the body speeds up the life cycle of skin cells. Instead of maturing and shedding over the course of about a month, skin cells rise to the surface in just a few days. Those extra cells build up and form thick, scaly patches called plaques.

Psoriasis can show up almost anywhere on the body, but common areas include the:

• elbows

• knees

• scalp

• lower back

• skin folds

• hands and feet

• nails

It is important to know that psoriasis is not contagious. You cannot catch it from another person, and you cannot spread it by touch.

Psoriasis is also not “just dry skin.” It is a real medical condition driven by inflammation in the immune system. That matters because the inflammation does not always stay limited to the skin. Psoriasis can also affect the joints, mental health, and overall quality of life.

Fast Facts

• What is psoriasis?

  A chronic immune-mediated inflammatory skin disease

• What does it look like?

  Thick, scaly plaques, patches, or inflamed areas of skin

• Can it happen in skin of color?

  Yes. Psoriasis affects people of all skin tones

• Does it always look red?

  No. In deeper skin tones it may look gray, violaceous, dark brown, or bluish

• Can it affect the scalp and nails?

  Yes. Scalp and nail psoriasis are common

• Can it affect the joints?

  Yes. Up to 30% of people with psoriasis may develop psoriatic arthritis

• Can it leave dark marks?

  Yes. Post-inflammatory hyperpigmentation or hypopigmentation can linger after plaques improve

Psoriasis affects millions of adults worldwide. In the United States, it is estimated to affect about 3% of adults, although the true burden in skin of color is likely underestimated because psoriasis is more likely to be underdiagnosed in non-White populations.

Why Psoriasis in Skin of Color Deserves Special Attention

Psoriasis affects people of every skin tone, but the experience of psoriasis is not always the same across skin colors.

In people with deeper skin tones, psoriasis is often:

• harder to recognize visually

• diagnosed later

• more likely to leave behind pigment changes

• more likely to have a larger quality-of-life impact

• less likely to be treated with biologics even when disease is severe

That combination matters. When psoriasis is harder to identify and more likely to leave long-lasting dark or light marks, it can affect not just the skin itself but also confidence, comfort, and trust in the healthcare system.

One of the biggest problems is that many medical images and online descriptions of psoriasis are still based on lighter skin. If someone expects psoriasis to always look “red and silvery,” they may miss how it presents in darker skin tones.

What Psoriasis Looks Like on Deeper Skin Tones

On lighter skin, psoriasis is often described as well-demarcated pink or salmon-colored plaques with silvery scale. In skin of color, the same disease may look very different.

Psoriasis in skin of color may appear:

• violaceous or purple

• gray or bluish-gray

• dark brown

• hyperpigmented with overlying scale

• less obviously red than textbook descriptions suggest

The scale may still be silvery-white, but sometimes it appears gray, less prominent, or blends differently with the surrounding skin tone.

This difference in color matters because it can make psoriasis easier to mistake for:

• eczema

• seborrheic dermatitis

• lichen planus

• fungal infection

• dry skin

• post-inflammatory pigment changes without active inflammation

Common symptoms include:

• thick scaly patches

• itching

• burning or tenderness

• flaking

• cracking

• bleeding after scratching or scale removal

• scalp scaling

• nail pitting or lifting

• dark or light spots after plaques heal

Some people mainly struggle with itching and flaking. Others are more bothered by visible plaques, scalp involvement, or the pigment changes that remain after the psoriasis itself improves.

Common Types of Psoriasis

Psoriasis does not look exactly the same in every person. Some people have one main pattern, while others have a combination of scalp, nail, fold, or body involvement.

• Plaque psoriasis

  This is the most common type and accounts for the majority of cases. It causes well-defined thick plaques with scale, often on the elbows, knees, scalp, and lower back.

  In skin of color, these plaques may look violet, dark brown, gray, or hyperpigmented rather than bright red.

• Scalp psoriasis

  Scalp psoriasis can look like:

  • thick scalp scale

  • itchy patches

  • flaking that resembles severe dandruff

  • plaques extending past the hairline

  • soreness or tenderness of the scalp

  Scalp psoriasis deserves special attention in skin of color because it can be confused with seborrheic dermatitis, and treatment has to be practical for different hair textures and wash routines.

• Inverse psoriasis

  Inverse psoriasis affects skin folds, such as:

  • under the breasts

  • groin

  • buttock crease

  • armpits

  Because these areas are moist, the plaques may be smooth and inflamed rather than thick and scaly. It can easily be mistaken for fungal rash, intertrigo, or irritation.

• Guttate psoriasis

  Guttate psoriasis causes many small scaly papules or plaques, often appearing suddenly after a streptococcal infection. It is more common in children and young adults.

• Nail psoriasis

  Nail psoriasis can cause:

  • pitting

  • ridging

  • thickening

  • separation of the nail from the nail bed

  • discoloration

  • debris under the nail

  Nail involvement matters because it can affect function and may raise concern for psoriatic arthritis.

• Pustular or erythrodermic psoriasis

  These are more severe and less common forms of psoriasis. Pustular psoriasis can cause sterile pustules and widespread inflammation. Erythrodermic psoriasis can involve widespread redness and scaling over much of the body and can be a medical emergency.

Why Psoriasis Happens

Psoriasis is driven by a dysregulated immune response in genetically susceptible people. You do not need to know every cytokine pathway to understand the big picture, but it helps to know that this is not simply “a skin problem.”

In psoriasis, parts of the immune system become overactive and send signals that cause skin cells to multiply too quickly, which is why many modern psoriasis treatments are designed to target those immune system pathways directly.

Common triggers that can worsen psoriasis include:

• stress

• skin injury or friction

• infections, especially strep throat

• smoking

• obesity

• heavy alcohol use

• certain medications such as lithium or beta-blockers

• abrupt withdrawal of systemic steroids

Not everyone has the same triggers, and not every flare has a clear explanation. But it can be helpful to notice patterns, especially if your psoriasis seems to worsen after illness, stress, or skin irritation.

Skin of Color Perspective

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Skin of Color Perspective |

Why diagnosis may take longer

Psoriasis in skin of color is often diagnosed later than in lighter skin tones. One reason is that the color and scale can look different from what clinicians are trained to expect. Another is that psoriasis may initially be mistaken for eczema, dry skin, fungal infection, or “just dandruff.”

People with skin of color are more likely to need a biopsy to confirm psoriasis and may wait longer for a diagnosis. That delay matters because untreated inflammation can mean more time spent uncomfortable, more time dealing with plaques, and a greater chance of lingering pigment changes after lesions improve.

Pigment changes can become part of the disease burden

One of the most important skin-of-color differences is what happens after the plaque improves.

Psoriasis in deeper skin tones often leaves behind:

1. post-inflammatory hyperpigmentation (dark marks)

2. post-inflammatory hypopigmentation (lighter marks)

These pigment changes are not the same thing as active psoriasis, but they can be just as distressing— sometimes more distressing—because they may last for months after the plaques flatten.

For some people, the most frustrating part of psoriasis is not just the scale or itch. It is the feeling that the disease “never really goes away” because the discoloration remains long after the flare ends.

Quality-of-life impact may be greater

Studies suggest psoriasis can have a greater quality-of-life impact in people with skin of color, even after accounting for disease severity. That may reflect a combination of factors:

• delayed diagnosis

• undertreatment

• pigment changes

• scalp involvement

• visibility of lesions

• the emotional burden of having a chronic visible disease that is often misunderstood

Psoriasis vs Eczema: How to Tell the Difference

Psoriasis and eczema can overlap in appearance, especially in skin of color, but there are a few clues that can help separate them.

Psoriasis is more likely to cause:

• well-defined plaques

• thicker scale

• involvement of the scalp, elbows, knees, or lower back

• nail pitting or nail lifting

• symmetrical plaques

• less oozing and more buildup of scale

Eczema is more likely to cause:

• intense itching

• more poorly defined patches

• more dryness and cracking

• a history of allergies, asthma, or sensitive skin

• involvement of the flexural areas such as the inside of the elbows and behind the knees

That said, real life is not always that neat. Some people have overlapping features, and in skin of color both conditions can leave behind pigment changes. If the diagnosis is unclear, a dermatologist may need to examine the skin closely—or occasionally perform a biopsy.

Why Psoriasis Is More Than a Skin Condition

Psoriasis is often introduced as a skin disease, but it is better understood as a systemic inflammatory condition. The skin is what you see. The inflammation is the bigger story.

Psoriatic arthritis

One of the most important complications is psoriatic arthritis, which affects up to 30% of people with psoriasis. It can cause:

• joint pain

• morning stiffness

• swollen fingers or toes

• heel pain

• back pain

• nail changes

Psoriatic arthritis can permanently damage joints if it is not recognized and treated early.

Cardiometabolic health

Psoriasis is also linked to higher rates of:

• obesity

• high blood pressure

• diabetes

• abnormal cholesterol

• cardiovascular disease

Mental health

Living with psoriasis can also affect emotional health. People with psoriasis have higher rates of:

• depression

• anxiety

• social withdrawal

• sleep disruption

• embarrassment related to visible lesions or flaking 

This is one reason it is important not to minimize psoriasis as a “cosmetic issue.” It can affect daily life in very real ways.

Scalp Psoriasis in Skin of Color

Scalp psoriasis deserves its own discussion because it can be especially disruptive and often requires treatment plans tailored to hair texture, styling routines, and wash frequency.

Scalp psoriasis may cause:

• thick scale or plaques on the scalp

• flaking that resembles severe dandruff

• itching or soreness

• plaques that extend past the hairline

• discomfort when washing, styling, or combing the hair

For patients with textured hair, the standard advice to “wash frequently and apply a lotion daily” may not be realistic or culturally appropriate. That does not mean treatment cannot work—it means treatment has to fit the patient.

Treatment planning for textured hair may include:

• choosing foams, oils, solutions, or steroid scalp oils that can be applied through the hair matching the treatment schedule to the person’s wash routine

• discussing whether scale-softening treatments can be used before wash day

• being mindful of how thick ointments or daily shampoos may affect styling

This is a good example of why culturally competent dermatology matters. A treatment only works if it is effective and realistic for the person who has to use it.

How Psoriasis Is Treated

Psoriasis treatment depends on:

• how much of the body is affected

• where the psoriasis is located

• how severe the plaques are

• whether the scalp, nails, palms, soles, or joints are involved

• how much the disease is affecting quality of life

There is no single “best” treatment for everyone. The goal is to control inflammation, reduce scale and itch, improve quality of life, and prevent long-term complications.

• Treatment for Mild Psoriasis

  Topical corticosteroids

  These reduce inflammation and are often first-line treatment for plaques on the body. Stronger steroids may be used on thicker plaques, while lower-potency steroids are used on sensitive areas such as the face, groin, or skin folds.

  Vitamin D analogues

  Medications such as calcipotriene help slow skin cell growth and are often paired with a topical steroid.

  Topical calcineurin inhibitors

  Tacrolimus and pimecrolimus are steroid-sparing options that can be useful for the face, skin folds, and genital skin.

  Roflumilast

  Roflumilast is a newer nonsteroidal topical treatment that can be helpful for plaque psoriasis, including some sensitive areas.

  Tazarotene

  A topical retinoid that can help with plaque psoriasis, though it may be irritating in some patients.

  Over-the-Counter Options

  Over-the-counter products usually do not control moderate or severe psoriasis by themselves, but they can still be helpful as part of a routine.

  Helpful OTC options may include:

  Thick fragrance-free moisturizers- Creams and ointments help reduce dryness, itching, and scale. Products with ceramides or colloidal oatmeal can be helpful.

  Salicylic acid- Salicylic acid can help soften and lift thick scale. It is often found in shampoos, creams, or lotions. It should be used carefully and not applied excessively over very large areas without guidance.

  Coal tar products- Coal tar shampoos and creams can help reduce scale and itching in some people, especially for scalp psoriasis. They are not glamorous, and the smell can be a downside, but they are still useful for some patients.

  Hydrocortisone 1%- This may temporarily calm very mild localized inflammation, but it is generally not strong enough for most psoriasis plaques and should not be relied on long-term.

  Sunscreen- Sunscreen does not treat psoriasis directly, but it can help reduce worsening of post-inflammatory hyperpigmentation after plaques heal.

• Treatment for Moderate Psoriasis

  If psoriasis is more widespread, or if topical therapy alone is not enough, treatment may move to phototherapy or systemic medication.

  Narrowband UVB phototherapy

  Phototherapy can be very effective for psoriasis. It works by calming immune activity in the skin.

  In skin of color, phototherapy can still work well, but there are a few important considerations:

  • darker skin may require different dosing to achieve the same effect

  • irritation can worsen pigment changes

  • surrounding skin may tan or darken

  • treatment usually requires repeated visits unless home phototherapy is used

  Phototherapy is a good example of a treatment that can be excellent when used thoughtfully but still needs skin-of-color nuance.

• Treatment for Moderate-to-Severe Psoriasis

  When psoriasis is extensive, significantly affecting quality of life, or involving the joints, nails, palms, soles, or difficult body areas, systemic treatment is often appropriate.

  Oral systemic medications

  Methotrexate- A long-established medication that can help both skin psoriasis and psoriatic arthritis. It requires lab monitoring.

  Apremilast- An oral PDE4 inhibitor that may be helpful for some patients with moderate psoriasis. It tends to be less aggressive than biologics but may be a good fit for the right person.

  Deucravacitinib- A newer oral TYK2 inhibitor that has become an important option for moderate-to-severe plaque psoriasis.

  Biologic medications- Biologics are injectable or infusion-based medications that target specific immune pathways involved in psoriasis. They have transformed psoriasis treatment and can lead to dramatic clearing for many patients.

  Major biologic classes include:

  • TNF-alpha inhibitors

  • IL-12/23 inhibitors

  • IL-17 inhibitors

  • IL-23 inhibitors

  For many patients with moderate-to-severe psoriasis, biologics offer the most effective control available.

  Biologics and Skin of Color

  One of the most frustrating realities in psoriasis care is that people with skin of color are less likely to receive biologic therapy, even when disease severity would justify it. That matters because undertreatment can mean more time living with active inflammation, more time dealing with pigment changes, and more time with reduced quality of life.

  The good news is that modern biologic therapies work in skin of color too. Clinical research has increasingly shown that highly effective treatments—particularly therapies targeting IL-17 and IL-23 pathways—can achieve strong outcomes across skin tones.

  If psoriasis is significantly affecting your life and topical medications are not enough, it is reasonable to ask whether systemic treatment or a biologic should be part of the conversation.

Skin of Color Treatment Pearls

1. Control inflammation early to reduce pigment changes

The longer plaques stay active, the more likely they are to leave behind hyperpigmentation or hypopigmentation after they improve.

2. Be thoughtful with irritating topicals

Some psoriasis treatments can irritate the skin. In skin of color, irritation may increase the risk of lingering pigment changes, so treatment often needs to be escalated thoughtfully rather than aggressively all at once.

3. Don’t ignore scalp, nail, or joint symptoms

These can all be part of the psoriasis story and may push treatment decisions toward more systemic therapy.

4. Sunscreen matters after plaques improve

Once active plaques calm down, daily sunscreen can help prevent post-inflammatory hyperpigmentation from getting darker.

5. Pigment changes may need their own treatment plan

Sometimes the psoriasis improves but the discoloration remains. That does not always mean the psoriasis is still active—it may mean the inflammation left behind pigment changes that need time, sunscreen, and sometimes targeted treatment.

Treating Dark Spots or Light Spots After Psoriasis

After psoriasis plaques heal, many people with deeper skin tones are left with post-inflammatory hyperpigmentation or post-inflammatory hypopigmentation. This can be one of the most frustrating parts of recovery.

A few important points:

• Dark or light spots do not always mean the psoriasis is still active.

• Pigment changes can take weeks to months to improve.

• Sunscreen helps prevent hyperpigmented areas from darkening further.

• If discoloration is persistent, a dermatologist may discuss options such as:

• azelaic acid

• retinoids

• hydroquinone for selected hyperpigmented areas

• careful observation if the skin is still healing

The first priority is still treating the active psoriasis. Once the inflammation is controlled, the pigment conversation becomes easier.

Build a Routine

Morning

1. Use a gentle cleanser if needed

2. Apply prescription topical medication if directed

3. Moisturize affected areas

4. Apply sunscreen to exposed skin, especially areas with lingering pigment change

Evening

1. Cleanse gently

2. Apply prescription treatment to active plaques if directed

3. Seal in moisture with a cream or ointment

For the scalp

1. Use medicated shampoo or scalp treatment as prescribed

2. Loosen thick scale gently rather than aggressively picking

3. Follow a schedule that fits your actual hair routine rather than a routine you will never realistically maintain

The goal is not to build a complicated routine. It is to control inflammation, protect the skin barrier, and keep the plan sustainable.

Common Mistakes That Can Make Psoriasis Worse

1. Treating it like “just dry skin”

Psoriasis is inflammatory, not simply dry. Moisturizer helps, but it usually is not enough by itself.

2. Scratching or picking thick scale aggressively

This can worsen irritation, increase discomfort, and trigger more inflammation.

3. Ignoring joint pain

Joint symptoms can be the clue that psoriatic arthritis is developing.

4. Assuming scalp psoriasis is just dandruff

Scalp psoriasis often needs stronger, more targeted treatment than routine dandruff care.

5. Stopping treatment as soon as plaques flatten

Psoriasis is chronic. Maintenance plans matter.

6. Accepting undertreatment

If your psoriasis is still significantly affecting your quality of life, it is reasonable to ask whether there are better treatment options.

When to See a Dermatologist

It is worth seeing a dermatologist if:

• you have persistent scaly patches that are not improving

• plaques are spreading or getting thicker

• you have scalp psoriasis, especially if it is painful, thick, or difficult to manage

• you notice nail pitting, lifting, or thickening

• you develop joint pain, stiffness, swollen fingers or toes, or back pain

• you are left with dark or light spots after plaques heal and are not sure whether the psoriasis is still active

• psoriasis is affecting your confidence, sleep, mood, or daily life

• over-the-counter products are not enough

• you want to discuss whether phototherapy, oral treatment, or biologics might be appropriate

Early diagnosis matters. In skin of color, it can help reduce time spent untreated, limit long-lasting pigment changes, and make it easier to get the right treatment before the disease becomes more disruptive.

FAQ

• Does psoriasis happen in Black and Brown skin?

  Yes. Psoriasis affects people of all skin tones. It may be diagnosed less often in some populations, but it absolutely occurs in skin of color.

• Why doesn’t my psoriasis look red?

  In deeper skin tones, psoriasis often appears violaceous, gray, dark brown, or bluish instead of bright red or salmon-pink.

• Can psoriasis leave dark marks?

  Yes. Psoriasis can leave post-inflammatory hyperpigmentation or hypopigmentation, especially in deeper skin tones.

• Is psoriasis contagious?

  No. Psoriasis is not contagious.

• Can psoriasis affect the scalp?

  Yes. Scalp psoriasis is very common and can cause thick scale, itching, flaking, and plaques that extend beyond the hairline.

• What is the biggest complication of psoriasis?

  One of the most important complications is psoriatic arthritis, which can damage joints if not treated. Psoriasis is also linked to other inflammatory health conditions such as obesity, diabetes, and cardiovascular disease.

• Can I treat psoriasis with over-the-counter products alone?

  Sometimes very mild symptoms can be partially managed with moisturizers, salicylic acid, or coal tar products, but many people need prescription treatment to truly control the disease.

• Why does psoriasis seem harder to treat in skin of color?

  It is not necessarily harder to treat biologically, but it may be harder to diagnose, more likely to leave pigment changes, and more likely to be undertreated. Those factors can make the overall experience more difficult.