Psoriasis is a skin condition that causes flaky patches of skin which form scales. On brown, black, and white skin the patches can look pink or red, and the scales white or silvery. On brown and black skin, the patches can also look purple or dark brown, and the scales may look grey. These patches normally appear on your elbows, knees, scalp, and lower back, but can appear anywhere on your body. The severity of psoriasis varies greatly from person to person. For some it's just a minor irritation, but for others it can have a big impact on their lives.

Atopic dermatitis (eczema) is a condition that causes dry, itchy, and inflamed skin. It's common in young children but can occur at any age. Atopic dermatitis is long lasting (chronic) and tends to flare sometimes. It can be irritating but it's not contagious. Atopic dermatitis (eczema) symptoms can appear anywhere on the body and vary widely from person to person. They may include: Dry, cracked skin, Itchiness (pruritus), Rash on swollen skin that varies in color depending on your skin color, Small, raised bumps, on brown or Black skin, Oozing and crusting, Thickened skin, Darkening of the skin around the eyes, Raw, sensitive skin from scratching

Seborrheic dermatitis is a common skin condition that mainly affects your scalp. It causes scaly patches, inflamed skin, and stubborn dandruff. It usually affects oily areas of the body, such as the face, sides of the nose, eyebrows, ears, eyelids, and chest. This condition can be irritating but it's not contagious, and it doesn't cause permanent hair loss. Seborrheic dermatitis signs and symptoms may include Flaking skin (dandruff) on your scalp, hair, eyebrows, beard or mustache, Patches of greasy skin covered with flaky white or yellow scales or crust on the scalp, face, sides of the nose, eyebrows, ears, eyelids, chest, armpits, groin area or under the breasts, Rash that may look darker or lighter in people with brown or Black skin and redder in those with white skin, Ring-shaped (annular) rash, for a type called petaloid seborrheic dermatitis, Itchiness (pruritus)

Hives — also called urticaria — is a skin reaction that causes itchy welts. Chronic hives are welts that last for more than six weeks and return often over months or years. Often, the cause of chronic hives isn't clear. The welts often start as itchy patches that turn into swollen welts that vary in size. These welts appear and fade at random as the reaction runs its course. Chronic hives can be very uncomfortable and interfere with sleep and daily activities. Symptoms of chronic hives include: Batches of welts (wheals) that can arise anywhere on the body, Welts that might be red, purple or skin-coloured, depending on your skin colour, Welts that vary in size, change shape, and appear and fade repeatedly, Itchiness (pruritus), which can be intense, Painful swelling (angioedema) around the eyes, cheeks or lips, Flares triggered by heat, exercise or stress, Symptoms that persist for more than six weeks and recur often and anytime, sometimes for months or years.

Contact dermatitis is a type of eczema triggered by contact with a particular substance. Eczema is the name for a group of conditions that cause skin to become dry and irritated. Contact dermatitis usually improves or clears up completely if the substance causing the problem is identified and avoided. Treatments are also available to help ease the symptoms. Contact dermatitis causes the skin to become itchy, blistered, dry and cracked. Lighter skin can become red, and darker skin can become dark brown, purple, or grey. This reaction usually occurs within a few hours or days of exposure to an irritant or allergen. Symptoms can affect any part of the body but most commonly the hands and face.

Acne vulgaris is a skin condition that occurs when hair follicles are blocked with dead skin cells, bacteria, and oil (sebum). The blocked follicles cause blemishes on the skin, including pimples, blackheads, whiteheads, and cysts. Also known as common acne, one of its main causes is hormones, especially around puberty.

Vitiligo is a disease that causes loss of skin colour in patches. The discoloured areas usually get bigger with time. The condition can affect the skin on any part of the body. It can also affect hair and the inside of the mouth. Normally, the colour of hair and skin is determined by melanin. Vitiligo occurs when cells that produce melanin die or stop functioning. 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.