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Acanthosis nigricans is a medical sign characterised by brown-to-black, poorly defined, velvety hyperpigmentation of the skin. [1] It is usually found in body folds, [2] such as the posterior and lateral folds of the neck, the armpits, groin, navel, forehead and other areas.
Xeroderma, xerosis or xerosis cutis, or simply dry skin, is a skin condition characterized by excessively dry skin. [2] The term derives from Greek ξηρός (xeros) ' dry ' and δέρμα (derma) ' skin '. In most cases, dry skin can safely be treated with moisturizers (also called emollients).
Severe cases, although rare, do exist. Severe cases entail the buildup of scales everywhere, with areas of the body that have a concentration of sweat glands being the least affected. Areas where the skin rubs against together, such as the armpits, the groin, and the "folded" areas of the elbow and knees, are less affected.
They might also get patches on their arms and legs. During childhood until puberty, eczema patches often appear on the neck, ankles, bends of the elbows, and back of the knees.
The skin is taut and smooth when the elbow is flexed, but loose and wrinkled when the elbow is straightened. [4] It may lose elasticity and begin to sag with age. [5] The bursa located between the ulna and the wenis reduces friction between the skin and the bone. [6] The region is not typically sensitive to acute pain from pinching.
After a few months hyperkeratosis develops with a dark grey or brown, ridged appearance on the ankles, knees and elbows. [4] Palms and soles are generally unaffected. [3] A slightly unpleasant, sweet odour may be present. [2]
Whether you're noticing new dark spots or more pronounced wrinkles and sagging skin, a shake up to your routine could do the trick, like adding a collagen-boosting day cream to your beauty cabinet.
Gottron's sign is a pathognomonic cutaneous manifestation associated with dermatomyositis (DM), which is an inflammatory disorder affecting the skin and muscles. [1] The primary lesion of dermatomyositis appears as a violaceous, macular erythema with a symmetric distribution, which may progress and become poikilodermatous (atrophic with telangiectasia and pigmentary changes) and indurated (as ...