Infected Pilonidal Cyst (Antibiotic Treatment)
A pilonidal cyst is a swelling that starts under the skin on the sacrum near the tailbone. It may look like a small dimple. It can fill with skin oils, hair, and dead skin cells. It may stay small or grow larger. It may become infected with normal skin bacteria because it often has an opening to the surface. Young men are particularly prone to them as are people who sit a lot at their jobs, like truck drivers. Pilonidal cysts are more common in barbers and dog groomers who work with hair. Others at risk include people with a lot of body hair, as well as those who are overweight.
Causes
The cause of pilonidal cysts has been debated since they were first recognized. A cyst may be present at birth and go unnoticed. Injury, rubbing, or skin irritation may also cause pilonidal cysts. It can also be caused by an ingrown hair. The cause is most likely a combination of these things. Some injury or irritation can lead to pilonidal cysts.
Symptoms
A pilonidal cyst may be small and painless. If it becomes inflamed or infected, you may have these symptoms:
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Swelling
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Irritation or redness
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Pain
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Drainage
The cyst can swell and drain on its own. The swelling and drainage can come and go.
Treatment
A limited infection can be treated with antibiotics and home care. You have been given antibiotics to treat your infected pilonidal cyst.
Home care
The following guidelines will help you care for your wound at home:
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Don't squeeze the pilonidal cyst or stick a needle in it to drain it. This will make the infection worse, or spread it.
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Cover the cyst with a pad or something similar. This is to keep it from becoming more irritated, damaged, and painful.
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Talk with your doctor about comfort measures. like applying warm, moist compresses to the cyst or sitting in a warm bath. Follow your doctor's specific instructions.
Medicines
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Take acetaminophen or ibuprofen for pain unless you were given a different pain medicine to use. Talk with your doctor before using these medicines if you have chronic liver or kidney disease. Also talk with them if you've ever had a stomach ulcer or digestive bleeding, or if you're taking blood-thinner medicines.
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If your doctor prescribed antibiotics, take them as directed. Do not stop taking them just because you feel better. You need to take the full course of antibiotics.
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Use antibiotic cream or ointment if your doctor has prescribed it for you.
Preventing future infections
Once this infection has healed, follow these tips to lower the risk for another infection:
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Keep the area of the cyst clean by bathing or showering every day.
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Don't wear tight-fitting clothing. This will help reduce sweat and irritation of the skin.
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You may need surgery to completely remove the cyst if it keeps coming back. The surgery can only be done when the cyst isn't infected. Ask your doctor for more information.
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Watch for signs of infection listed below so treatment may be started early.
Follow-up care
Follow up with your doctor as advised. Check your wound every day for the signs listed below.
When to contact your doctor
Contact your doctor right away if:
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Pus is coming from the cyst.
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You have increasing local pain, redness, or swelling.
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You have a fever of 100.4°F (38°C) or higher, or as advised by your doctor.
Online Medical Reviewer:
Daphne Pierce-Smith RN MSN
Online Medical Reviewer:
Melinda Murray Ratini DO
Online Medical Reviewer:
Rajadurai Samnishanth Researcher
Date Last Reviewed:
5/1/2025
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