Common chronic inflammatory skin condition.
Characterised by erythematous yellowish, scaling greasy/waxy eruption over the scalp, eyebrows, ears, face, chest and intertriginous areas – where sebaceous glands are most active. More common in males. Worse during adolescence - affects up to 5%. May be due to a hypersensitivity reaction to the fungus, Pityrosporum ovale or orbiculare. Common in HIV.