Nail disorders

  • Synovial cyst

    Synovial cyst

    Typically painless, treatment involves draining and removing the cyst.

  • Psoriasis of the nail

    Psoriasis of the nail

    A large increase in the speed of epidermal cell production causes scaly patches to form on the nails. Psoriasis may be caused by infection, stress, or be drug-induced.

  • Clubbed fingers

    Clubbed fingers

    Clubbing (acropachy) often occurs as a symptom of conditions associated with a decrease in oxygen levels of the blood (e.g., kidney failure, lung disorders, bowel disease, and some heart disorders).

  • Discolored nails

    Discolored nails

    This patient

  • Beau


    A Beau

  • Psoriasis of the nail

    Psoriasis of the nail

    Psoriasis occurs when excessive growth of skin cells leads to plaques of itchy, scaly, and thickened skin that may become infected.

  • Onychogryphosis


    Onychogryphosis is a distortion of the toenails attributable to chronic irritation and inflammation.

  • Melanonychia


    The two types of melanonychia, a nail discoloration caused by melanin are transverse and longitudinal (shown here), which may be a sign of subungual melanoma.

  • Onychomycosis (tinea unguium)

    Onychomycosis (tinea unguium)

    Tineal infections are caused by dermatophytes and may be acquired from an infected person, an animal, soil, or shower floors.

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Understanding nail disorders, how to treat them, and when to refer to a dermatology specialist are essential skills for the primary-care clinician.

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