An intensely itchy, eczematous rash on the scalp, often caused by an allergen in hair dye or other hair products.
A rare, suppurative scarring alopecia with painful, boggy nodules and abscesses on the scalp that form interconnecting sinus tracts.
Atopic or contact dermatitis of the scalp presenting with erythema, scaling, and intense pruritus.
A condition in the elderly, often on a sun-damaged scalp, with chronic, sterile pustules, erosions, and crusts that heal with scarring alopecia.
Inflammation of hair follicles, presenting as multiple, small, tender, erythematous papules and pustules at the base of hairs.
Infestation with pediculosis capitis causes intense itching, leading to secondary excoriations, eczema, and sometimes impetigo, with visible nits on hair shafts.
Presents as well-demarcated, erythematous plaques with a thick, silvery-white scale that often extends beyond the hairline.
A very common cause of 'dandruff,' with diffuse, greasy, yellowish scales on an erythematous base.
