The chapter discusses about the disorders of adnexae or appendages. Acne vulgaris is a chronic inflammatory disease of pilosebaceous follicles, typically on face, neck, upper trunk and upper arms; its typical lesions are comedones, papules, pustules, nodules, and scars. Triggers of acne vulgaris are puberty, oily skin, summer, drugs, menses, and cosmetics. Rosacea is a chronic disorder of facial convexities that occur between 30–50 years of age. Hidradenitis suppurativa is a disease of occlusion of hair follicles and apocrine ducts that presents as comedones, red, tender nodules, abscesses, sinuses and scarring in the apocrine gland-bearing areas of the body, most commonly the skin folds—axillary, inguinal and ano-genital regions. Other topics discussed are Fordyce spots or Fordyce disease, Fox–Fordyce disease, miliaria (prickly heat), bromhidrosis, chromhidrosis (colored sweat).