There is an area where pubic hair is missing.

The absence of a patch of pubic hair is usually caused by physiological factors, but may also result from pathological conditions such as folliculitis or seborrheic dermatitis. The specific causes are as follows:

I. Physiological Factors

With increasing age, ovarian function in patients declines, leading to reduced levels of estrogen, which may cause pubic hair loss. In such cases, no special treatment is required; simply improving nutritional intake can help alleviate the condition.

II. Pathological Factors

1. Folliculitis

If a patient does not maintain proper hygiene of the external genital area, it may become contaminated with urine, feces, and other substances, leading to bacterial infection. This can deprive hair follicles of nutrients and eventually cause hair loss. In such cases, patients may follow medical advice to use topical medications such as mupirocin ointment or fusidic acid ointment.

2. Seborrheic Dermatitis

If, in addition to the above symptoms, the patient experiences widespread hair loss, this may be due to seborrheic dermatitis. This condition refers to a skin disorder occurring in areas rich in sebaceous glands, often caused by overactive sebaceous gland function. Inflammation leads to itching, prompting the patient to scratch repeatedly, resulting in the aforementioned hair loss. Treatment may include ketoconazole cream or miconazole nitrate cream, used as directed by a physician.

Besides the above, hair loss could also be caused by pituitary prolactinoma. It is recommended that patients maintain cleanliness and dryness of the affected area in daily life, wear comfortable, loose-fitting underwear, and avoid aggravating the condition.