The eyelash is the stiff hair on the margin of the eyelid. Loss of eyelash hair on one eye is termed unilateral, and loss of eyelash hair on both eyes is termed bilateral. This loss is categorized with the disorder alopecia universalis or alopecia capitis totalis.

Alopecia may be a result of the following causes: radiation; severe illness; a form of dermatitis; drugs, especially cytotoxic agents; an endocrine disorder; stress; autoimmune reactions; hereditary factors; or normal aging.

The symptoms of alopecia include: complete loss of hair over the body, with or without loss of scalp, eyebrow, and eyelash hair. The loss is painless, and it may be sudden or gradual.

A complete medical history and physical examination are usually carried out to discover any underlying disease or disorder.

Treatment will depend on the underlying condition. Various techniques to stimulate return of the hair may be attempted.

Usually, the hair will grow back in 90% of cases within 6 to 24 months.

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