A pilonidal sinus, also known as pilonidal disease or cyst, is a common skin condition that occurs in the sacrococcygeal region, which is the area just above the crease of the buttocks.

It typically presents as a small tunnel or pocket filled with hair, debris, and pus that forms under the skin.

Pilonidal sinuses can be painful and can lead to infections. Here are some key points about pilonidal sinus:

Causes: The exact cause of pilonidal sinuses is not always clear, but it is often associated with the following factors:

– Ingrown hairs: Hair follicles become ingrown, leading to the formation of a sinus. – Friction and pressure: Extended periods of sitting or localized pressure on the sacrococcygeal area can contribute to the development of pilonidal sinuses.

Symptoms: Common symptoms of pilonidal sinus include: – Pain and tenderness in the lower back or buttocks. – Swelling and redness in the affected area.

Infections: Pilonidal sinuses can become infected, leading to the development of abscesses. Infected pilonidal sinuses are usually more painful and may require medical intervention.

Diagnosis: Diagnosis is typically made through a physical examination by a healthcare provider. Imaging studies like ultrasound or MRI may be used to assess the extent of the sinus.

Treatment: Treatment options for pilonidal sinuses depend on the severity of the condition. They include: – Antibiotics: For mild infections, antibiotics may be prescribed.

– Incision and drainage: In the case of abscess formation, a healthcare provider may need to drain the pus.