These are benign growths on the scalp or on any part of the body. They appear as discrete, sharply demarcated brownish to black patches or raised flat-topped lumps of various sizes. They have a smooth or rough surface. These lesions appear in increasing numbers with age. They usually occur in older adults and are very common in persons over 50 years old. The lesions often appear on the face, but some may occur on the scalp. These lesions are benign and not associated with any symptoms.
They may appear as pits on the nail plate. The nail plate may be separated from the nail bed (onycholysis). The nail may lose its normal luster and appear discoloured. Gross thickening of the nail is another feature of psoriasis. Typical psoriasis rash would often be present on the fingers, toes and elsewhere on the body.
Cosmetic removal of seborrhoeic keratosis can be performed in various ways, depending on the clinical type. Early seborrhoeic keratosis can be treated with liquid nitrogen. When multiple, seborrhoiec keratosis is best treated with electrocautery.
