What Is Bowen’s Disease? Early Skin Cancer Signs, Causes & Treatment Options Bowen’s disease is squamous cell carcinoma in situ, an early form of skin cancer in which abnormal squamous cells are still confined to the outer skin layer.

What Are Boils (Furuncles)? Skin Infection Symptoms, Causes & Treatment Options Boils, medically called furuncles, are deep bacterial infections of hair follicles that form tender, swollen, pus-filled lumps under the skin. They are not ordinary pimples, and squeezing or

What Is Blue Nevus? Mole Appearance, Causes & Diagnosis A blue nevus is a usually benign mole made of pigment-producing melanocytes located deeper in the skin, which can make it look blue, blue-gray, slate, or blue-black. This page explains

What Are Blisters? Skin Fluid Bumps, Causes & Treatment Options Blisters are fluid-filled skin bumps that form when skin layers separate and fluid collects between them. Not every blister is a simple friction blister. Safe care depends on the

What Are Blackheads? Clogged Pores, Causes & Treatment Options Blackheads are open comedones, meaning clogged follicle openings where oil, keratin, and dead skin cells form a plug that stays open at the skin surface. The dark color is not

What Is Benign Keratosis? Skin Growth Appearance, Causes & Removal Options Benign keratosis is usually a noncancerous keratin-based skin growth that can look waxy, rough, scaly, warty, or stuck onto the skin. Benign keratosis often overlaps clinically with seborrheic