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Onychomycosis, also known as tinea unguium, [4] is a fungal infection of the nail. [2] Symptoms may include white or yellow nail discoloration, thickening of the nail, and separation of the nail from the nail bed. [2]
Onychauxis presents with thickened nails without deformity, and this simple thickening may be the result of trauma, acromegaly, Darier's disease, psoriasis, or pityriasis rubra pilaris, or, in some cases, hereditary. [1]: 783 [2] It may appear as loss of nail palate translucency, discoloration, and subungual hyperkeratosis.
A nail disease or onychosis is a disease or deformity of the nail.Although the nail is a structure produced by the skin and is a skin appendage, nail diseases have a distinct classification as they have their own signs and symptoms which may relate to other medical conditions.
Onychotillomania is a compulsive behavior in which a person picks constantly at the nails or tries to tear them off. [1] It is not the same as onychophagia, where the nails are bitten or chewed, or dermatillomania, where skin is bitten or scratched.
They appear as thickened, fissured cauliflower-like skin around the nail plate. Periungual warts often cause loss of the cuticle and paronychia. Nail biting increases susceptibility to these warts. [1] Warts of this kind often cause damage to the nail either by lifting the nail from the skin or causing the nail to partially detach.
Nail psoriasis can affect the fingernails and toenails. It may cause thickening of the nails with areas of pitting, ridges, irregular contour, and even raising of the nail from the nail bed. [16] Squamous-cell carcinoma is mainly cancer of the skin, but can also affect the nail bed. It is a rare malignant subungual tumor subject to misdiagnosis ...
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Athletes, especially runners, may be more likely to experience toenail involvement. [10] A portion of patients have onychomadesis recurrently without an obvious cause. [11] One of the most frequent causes of single-digit onychomadesis is local damage to the nail bed. [12] When more than one finger is involved, it may indicate a systemic cause. [13]