Pilonidal sinus disease in teenagers: Symptoms, causes and treatment options

Pilonidal sinus disease is a relatively common condition in teenagers and young adults, particularly during and after puberty. It can cause discomfort and sometimes infection in the cleft at the top of the buttocks.
In this article, Mr Hemanshoo Thakkar explains what pilonidal sinus disease is, why it happens, how to recognise it, and what treatment options are available to help manage or resolve it.
What is pilonidal sinus disease?
A pilonidal sinus is a small hole or tunnel under the skin, usually located in the crease between the buttocks (the natal cleft). This tract can become infected, leading to pain, swelling, and sometimes discharge of pus or blood.
What causes pilonidal sinus disease?
The word "pilonidal" means "nest of hair. One of the primary causes of pilonidal sinus disease is that loose hairs, combined with friction or pressure from sitting, become pushed into the skin. Over time, the body treats these hairs as foreign bodies and reacts with inflammation, leading to the formation of a sinus or cyst.
Risk factors in teenagers
Several factors make pilonidal sinus disease more likely in teenagers:
- Puberty: increased hair growth and sweat gland activity.
- Prolonged sitting: during studying or gaming.
- Obesity: excess weight can increase pressure and friction in the area.
- Tight clothing: this can cause rubbing and irritation.
What are the symptoms?
Pilonidal sinus disease may initially be painless and only appear as a small dimple in the skin. However, if it becomes infected, symptoms can include:
- Pain and swelling around the top of the buttocks.
- Redness and warmth in the area.
- Discharge of pus or blood.
- A tender lump or visible abscess.
- Fever, in more severe cases.
It’s important to seek medical advice if any of these signs are noticed, particularly if they recur.
How is pilonidal sinus disease treated?
Treatment depends on how severe the condition is and whether infection is present.
Conservative management
In mild cases without infection, keeping the area clean and hair-free may be all that’s required. Warm compresses and good hygiene can help.
Treating infection or abscess
If the sinus becomes infected, antibiotics may be prescribed. In some cases, a minor procedure to drain pus from an abscess might be necessary.
Surgery for recurrent or persistent disease
For recurrent or severe cases, surgical treatment may be recommended. This involves removing the sinus tract and cleaning the surrounding tissue. In most cases, surgery is performed as a day case under general anaesthetic, and recovery typically takes a few weeks.
Minimally invasive techniques are preferred where suitable, as they are associated with less postoperative discomfort and quicker recovery.
Common minimally invasive procedures include:
- Trephination: a technique involving small circular incisions to remove the sinus with minimal tissue disruption.
- EpSiT (Endoscopic Pilonidal Sinus Treatment): a keyhole approach using a small camera to visualise and clean the sinus tract from the inside.
Your child’s surgeon will discuss the most suitable option, including techniques that reduce the risk of recurrence.
Can pilonidal sinus disease come back?
Yes, recurrence is possible, particularly if aftercare is not followed. Steps to reduce recurrence include:
- Maintaining good hygiene in the area
- Keeping the area free of hair (with regular removal or laser treatment)
- Avoiding prolonged pressure on the area (such as sitting for long periods)
Pilonidal sinus disease is a manageable condition that often arises in the teenage years.
Visit Mr Thakkar’s profile if your child shows signs of pilonidal disease. Early assessment and management can make a significant difference in reducing complications and preventing recurrence.

