*Unknown *Trauma, excessive manicuring *Infection: especially fungal *Skin disease: psoriasis, dermatitis *Impaired peripheral circulation, e.g. Raynaud's syndrome *Systemic disease: hyperthyroidism, hypothyroidism, reactive arthritis, porphyria cutanea tarda *Reaction to detergents (e.g. washing dishes with bare hands, using detergent-based shampoos or soaps). *Patients with hepatocellular dysfunction may develop hair-thinning or hair loss and nail changes such as clubbing, leukonychia (whitening), or<unk> , affecting the nails of the hands and feet. *Onychomycosis (tinea) *It is common in ballet dancers *Chemotherapy (cytotoxic agents like taxanes, vinca alkaloids and others)
Onycholysis
Paronychia
Leukoedema
Chromonychia
Pathergy
Leukonychia
Petechia
Road rash