Overview: Allergic contact dermatitis is a delayed hypersensitivity reaction (the reaction to the allergen occurs 48–72 hours after exposure). The most common allergens causing allergic contact [...]
OVERVIEW: Actinic keratoses, also known as solar keratoses, are small rough or scaly areas of skin due to damage from sun exposure. Some actinic keratoses can turn into squamous cell skin cancer, [...]
OVERVIEW: Actinic cheilitis, sometimes known as “farmer’s lip” or “sailor’s lip,” is a precancerous condition related to cumulative lifetime sun exposure. The lower lip is most often affected. [...]
OVERVIEW: A skin tag (acrochordon) is a very common condition where small, flesh-colored growths on a thin stalk appear in areas where skin rubs skin such as the armpit, eyelids, and neck. They [...]
OVERVIEW: Some babies develop blemishes only on their face in the first 2-3 weeks of life. The rash looks like acne commonly seen in teens. The cause may be associated with maternal hormones and [...]
OVERVIEW: Acne keloidalis nuchae, is a condition characterized by inflamed bumps and scars on the back of the neck. Curly hair and the ability to form a keloid or hypertrophic scar are the two [...]
Overview: Acne excoriée, also known as “picker’s acne,” is most commonly seen in young women, or in patients using magnifying mirrors. Acne lesions, often small, are compulsively squeezed and [...]
Overview: Acanthosis nigricans is characterized by abnormal velvety thickening and darkening of the skin, most commonly around the neck. It can also occur in body creases such as the armpits or [...]
Basal cell carcinoma is a slow growing non-melanoma skin cancer. It is thought to be caused by over exposure to the harmful ultraviolet (UV) rays of the sun. It can be highly disfiguring if [...]
An atypical nevus, otherwise known as dysplastic nevus, is a non-cancerous mole that may resemble melanoma. The risk of developing melanoma increases with the number of atypical nevi found on a [...]