Hyperhidrosis is a condition characterized by excessive sweating that is not due to an underlying medical condition or physical activity. It affects approximately 3% of the population and can occur on the palms, soles of the feet, face, or underarms. The exact cause of hyperhidrosis is not known, but it is thought to be related to overactivity of the sympathetic nervous system, which controls the sweat glands.

Intertrigo is a common rash found in the folds of the skin. Common areas of involvement include the groin, in the folds of the abdomen, and under the breasts. Because of the friction, warmth, and moisture in the skin folds, the affected areas become red and raw. Symptoms can also include itching and burning.

Keratosis pilaris is a common, benign skin condition characterized by rough bumps on the skin, most often on the upper arms, thighs, and cheeks. It occurs when there is an overproduction of keratin leading to the formation of small, hard plugs in the hair follicles. The exact cause of keratosis pilaris is not known, but it is thought to be hereditary.

Lichen planus is a chronic, inflammatory skin condition that affects the skin and mucous membranes. It is characterized by flat-topped, purplish or reddish-purple bumps or patches on the skin, and it can also cause itching and burning sensations. The exact cause of lichen planus is not known, but it is thought to be related to an immune system dysfunction or an allergic reaction.

Lichen sclerosus is a chronic skin condition that most commonly affects the genital skin. The affected areas become thin, white, crinkled, irritated, and/or intensely itchy. Blisters and sores can also form. Left untreated, the condition can lead to scarring and can increase an individual’s risk for a type of skin cancer known as squamous cell carcinoma.

Lichen simplex chronicus is a condition where repeated scratching or rubbing of a site creates a localized, itchy, thickened, leathery patch of skin. Lichen simplex chronicus can present as a solitary lesion or as multiple lesions—usually in areas that are easy to reach. The most commonly involved

Cutaneous lupus erythematosus is a type of lupus that affects the skin. It is an autoimmune condition in which the immune system attacks the skin, causing rashes and other skin symptoms. Cutaneous lupus can be classified into several subtypes, including discoid lupus erythematosus, subacute cutaneous lupus erythematosus, and chronic cutaneous lupus erythematosus. Cutaneous lupus can also be a manifestation of systemic lupus erythematosus (SLE).

Melasma is a common skin condition where affected individuals develop splotchy, irregularly shaped, brown patches on the face. Common areas of involvement include the forehead, cheeks, nose, jawline, chin, and even the upper lip. It typically affects women between the ages of 20 and 40, and is more common in medium to darker skin tones.

Morphea, also known as localized scleroderma, is a rare condition that causes scar-like changes to the skin. Morphea commonly presents as oval lesions on the trunk (chest, abdomen, and/or back). It can also present as a linear stripe on the arms, legs, and even the forehead or scalp.

Nummular dermatitis is a type of eczema characterized by intensely itchy, red, scaly, and at times weeping or oozing, coin-shaped lesions. Nummular dermatitis typically affects the extremities, with the legs being the most common site of involvement. The condition can occur at any age, with men being affected slightly more often than women.

Pemphigus is a rare group of autoimmune skin diseases that causes painful blisters to form on the skin and/or mucous membranes (lips, mouth, esophagus, nose, eyes, genitals). The different types of pemphigus include: pemphigus vulgaris, pemphigus vegetans, pemphigus foliaceus, endemic pemphigus, pemphigus erythematosus, and paraneoplastic pemphigus.

Perioral dermatitis is a type of rash that typically presents as pink papules (small red bumps) and scaling around the mouth. In addition to affecting the area around the mouth, it can also appear around the nose or eyes and can be referred to as periorificial dermatitis. The exact cause of perioral dermatitis is unknown.

Pityriasis alba is often thought of as a low grade form of eczema. It presents with ill-defined, light colored (hypopigmented), slightly scaly patches of skin most commonly found on the face. It affects mainly children and adolescents and is often more noticeable in darker skin tones or tanned skin.