Canities subita

Canities subita is a medical phenomenon characterized by the sudden whitening or graying of the hair. The term is derived from the Latin canities, meaning "whiteness", and subita, meaning "sudden". This condition is often associated with extreme stress or trauma, although the exact cause is not fully understood.

History

The concept of Canities subita has been present in folklore and literature for centuries, with notable examples including the transformation of Thomas More's hair following his imprisonment, and the sudden graying of Marie Antoinette's hair prior to her execution during the French Revolution. However, it was not until the 19th century that the phenomenon was formally recognized and studied by the medical community.

Causes

The exact cause of Canities subita is not fully understood. It is often associated with extreme stress or trauma, which is believed to disrupt the hair's growth cycle and accelerate the aging process. Other potential causes include autoimmune diseases, such as alopecia areata, and certain genetic conditions.

Symptoms

The primary symptom of Canities subita is the sudden whitening or graying of the hair. This can occur over a period of hours or days, and typically affects the entire head of hair. In some cases, the condition may also affect the eyebrows and other body hair.

Diagnosis

Diagnosis of Canities subita is typically based on the patient's medical history and a physical examination. In some cases, a biopsy of the affected hair may be performed to rule out other potential causes.

Treatment

There is currently no known cure for Canities subita. Treatment is typically focused on addressing the underlying cause, if known, and managing the cosmetic effects of the condition. This may include the use of hair dyes or wigs.

See also

• Alopecia areata
• Hair loss
• Stress (biology)

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