Juliet Cohen

Pseudofolliculitis barbae is the medical term for razor bumps. It is most noticeable around the beard and neck. It causes small papules and pustules that can be confused with bacterial folliculitis.

Porphyria cutanea tarda (PCT) is the most common type of porphyria. PCT is frequently associated with hepatitis C virus (HCV) infection. Porphyria cutanea tarda is the most common porphyria and causes blistering of skin exposed to sunlight.

Pityriasis rubra pilaris is a skin disorder that causes constant inflammation and scaling (exfoliation) of the skin. PRP is not really a single condition, but rather a group of unusual eruptions that cause red scaly patches containing dry plugged...

Pityriasis alba is a common skin disorder similar to very mild eczema, causing round or oval, colorless, finely-scaled patches of skin. It is characterized by ill or well-defined, chronic patches of mild erythema, hypopigmentation and furfuraceous...

Pityriasis rosea is a harmless, common skin problem that causes a rash. It appears as a rash that can last from several weeks to several months. The way the rash looks may differ from person to person.

Pityriasis lichenoides is a rare skin disorder and characterized by multiple papules and plaques. Pityriasis lichenoides encompasses a spectrum of clinical presentations ranging from acute papular lesions that rapidly evolve into pseudovesicles and...

Periorbital cellulitis is a bacterial infection that occurs around the eyelid. It is also known as preseptal cellulitis or eyelid cellulitis. It may be caused by breaks in the skin around the eye, and subsequent spread to the eyelid; infection of...

Perioral dermatitis, a condition related to acne vulgaris. Perioral dermatitis is a skin disorder characterized by tiny red papules (bumps) around the mouth.

Paget's disease is a chronic bone disorder that is due to irregular breakdown and formation of bone tissue. Paget’s disease can affect any bone, but usually affects the skull, the hip and pelvis bones and bones in the legs and back.

Necrobiosis lipoidica diabeticorum is a chronic skin disease characterized by shiny plaques that vary in color from light yellowish to reddish-tan. Necrobiosis lipoidica diabeticorum is a rash which usually occurs on the legs.