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Triangular alopecia (also known as Temporal alopecia) is a condition characterized by hair loss or baldness in a triangular area, typically in the frontotemporal region of the scalp. The condition is usually present from birth, but it can also develop later in life. The exact cause of triangular alopecia is unknown, but it is thought to be related to a disruption in the hair growth cycle.

Symptoms

The primary symptom of triangular alopecia is hair loss in a triangular or oval area, usually on one side of the scalp. The bald area is typically smooth and without any signs of inflammation, scaling, or broken hairs. The condition is usually asymptomatic, meaning it does not cause any physical discomfort or other symptoms.

Causes

The exact cause of triangular alopecia is unknown. Some researchers believe it may be a congenital condition, meaning it is present from birth. Others believe it may be caused by a disruption in the hair growth cycle. It is not believed to be caused by stress, diet, or other lifestyle factors.

Diagnosis

Triangular alopecia is typically diagnosed by a dermatologist, who will examine the scalp and hair to determine the cause of the hair loss. A biopsy of the scalp may be performed to rule out other causes of hair loss. In some cases, a trichogram (a microscopic examination of the hair) may be performed to help confirm the diagnosis.

Treatment

There is no cure for triangular alopecia, but there are treatments available that can help manage the condition. These may include topical minoxidil, which can help stimulate hair growth, and surgical hair transplantation, which can help replace the lost hair. In some cases, no treatment is necessary, as the hair may regrow on its own.

See also

• Alopecia areata
• Alopecia totalis
• Alopecia universalis
• Androgenetic alopecia
• Traction alopecia

References

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