Pilonidal dimple is a condition that can occur anywhere along the crease between the buttocks, which runs from the bone at the bottom of the spine (sacrum) to the anus.
Pilonidal dimple may appear as:
Symptoms may include:
There may be no symptoms other than a small dent (pit) in the skin in the crease between the buttocks.
The cause of pilonidal disease is not clear. It is thought to be caused by hair growing into the skin in the crease between the buttocks.
This problem is more likely to occur in people who:
It may help to keep the area clean and dry and remove hair regularly to prevent infection.
Call your health care provider if you notice any of the following around the pilonidal cyst:
You will be asked for your medical history and given a physical examination. Sometimes you may be asked for the following information:
Rarely, a CT scan is done.
Pilonidal disease that causes no symptoms does not need to be treated.
A pilonidal abscess may be opened, drained, and packed with gauze. Antibiotics may be used if there is an infection spreading in the skin or you also have another, more severe illness.
Other surgeries that may be needed include:
Pilonidal abscess; Pilonidal sinus; Pilonidal cyst; Pilonidal disease
Stafford SJ, Klein MD. Pilonidal sinus and abscess. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 336.6.
Holtzman LC, Hitti E, Harrow J. Incision and drainage. In: Roberts JR, Hedges JR, eds. Clinical Procedures in Emergency Medicine. 6th ed. Philadelphia, PA: Saunders Elsevier; 2013:chap 37.
Humphries AF, Duncan JE. Evaluation and management of pilonidal disease. Surg Clin North Am. 2010;90:113-124.
Updated by: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
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