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Symptoms. The main sign of acanthosis nigricans is dark, thick, velvety skin in body folds and creases. It often appears in the armpits, groin and back of the neck. It develops slowly. The affected skin might be itchy, have an odor and develop skin tags.
Acral-lentiginous melanoma tends to be very dark, flat and have very unusual borders. It's more common in people of Asian descent and people with brown or Black skin. When to see a doctor. Make an appointment with your doctor or other healthcare professional if you notice any skin changes that worry you.
Age spots don't require medical care. Have your doctor look at spots that are black or have changed in appearance. These changes can be signs of melanoma, a serious form of skin cancer. It's best to have any new skin changes evaluated by a doctor, especially if a spot: Is black; Is increasing in size; Has an irregular border
A seborrheic keratosis (seb-o-REE-ik ker-uh-TOE-sis) is a common noncancerous (benign) skin growth. People tend to get more of them as they get older. Seborrheic keratoses are usually brown, black or light tan. The growths (lesions) look waxy or scaly and slightly raised.
Tinea versicolor is a common fungal infection of the skin. The fungus interferes with the normal pigmentation of the skin, resulting in small, discolored patches. These patches may be lighter or darker in color than the surrounding skin and most commonly affect the trunk and shoulders.
In people with brown and Black skin, dermatitis might cause the affected skin to darken or lighten. These conditions are called post-inflammatory hyperpigmentation and post-inflammatory hypopigmentation.
Psoriasis is a skin disease that causes a rash with itchy, scaly patches, most commonly on the knees, elbows, trunk and scalp. Psoriasis is a common, long-term (chronic) disease with no cure. It can be painful, interfere with sleep and make it hard to concentrate.
Vitiligo affects people of all skin types, but it may be more noticeable in people with brown or Black skin. The condition is not life-threatening or contagious. It can be stressful or make you feel bad about yourself.
People with brown or Black skin have more natural protection from the sun than do people with white skin. But brown or Black skin still can be damaged by the sun. Pictured below is an example of brown skin with signs of sun damage, including wrinkles and areas of uneven color.
Sometimes, what looks like dark circles may be shadows cast by puffy eyelids or hollows under the eyes that develop with aging. Some of the most common causes of dark circles under the eyes are: Atopic dermatitis (eczema) Contact dermatitis. Fatigue. Genetics. Rubbing or scratching your eyes.