Pilonidal disease—commonly known as a pilonidal cyst—is an inflammatory condition that occurs when loose hairs from the back or scalp penetrate the skin in the sacrococcygeal (tailbone) region. These hairs collect under the skin, forming a cyst or abscess that can cause pain, swelling, redness, and foul-smelling discharge.
What Is a Pilonidal Cyst?
A pilonidal cyst is an epithelial-lined sinus or cyst that develops beneath the skin in the cleft of the buttocks. The sinus cavity typically contains hair, dead skin particles, and debris. When infected, it may form a painful abscess; in chronic cases, it may lead to persistent drainage or fistula formation.
Many patients first notice symptoms such as pain when sitting, swelling, and localized tenderness. Once diagnosed, pilonidal cyst surgery is the most commonly recommended treatment.
Causes of Pilonidal Disease
Pilonidal disease occurs when shed hairs penetrate the skin or when hairs grow inward, leading to the formation of a fluid-filled cyst. Increased hair production in young adult men and obesity are additional risk factors.
Common Risk Factors
- Male gender
- Sedentary lifestyle
- Obesity
- Thick or coarse body hair
- Occupations requiring prolonged sitting
- Previous history of pilonidal disease
Symptoms of Pilonidal Cyst
Typical symptoms include pain—especially when sitting—redness, swelling, foul-smelling drainage, or bleeding from the cyst or abscess. In some cases, fever, fatigue, and nausea may accompany the infection.
Common symptoms include:
- Severe pain when sitting
- Localized pain at the tailbone
- Swelling in the sacrococcygeal area
- Abscess formation
- Foul-smelling or bloody discharge
- Nausea
- Fever and fatigue
How Is Pilonidal Disease Diagnosed?
A physical examination by a general surgeon is usually sufficient for diagnosis. Signs such as tenderness, swelling, sinus openings, and abscess formation confirm the condition. Imaging is rarely required unless the infection is severe.
Pilonidal Cyst Treatment
The most effective treatment for pilonidal disease is surgical intervention. Non-surgical options, such as drainage, phenol application, antibiotics, or laser therapy, may offer temporary relief but have higher recurrence rates.
Applying warm compresses may help reduce discomfort, but definitive treatment remains surgical removal of the cyst and sinus tract.
Surgical Treatment Options
1. Treatment of Acute Pilonidal Abscess
Acute infection requires urgent drainage. The abscess can be drained as a simple procedure, followed by elective surgery later. In some cases, removing the overlying skin flap and allowing the wound to heal naturally can resolve the issue without a second operation.
2. Chronic Pilonidal Disease Treatment
Conservative treatments include phenol injection, cauterization, cryotherapy, silver nitrate, or alcohol application to promote granulation tissue formation. Although inexpensive, these methods may lead to delayed healing. Recurrence is approximately 5%.
3. Cystotomy
The top of the sinus cavity is opened and left to heal secondarily. Recurrence rates range from 5–19%.
4. Primary Closure
After removing the sinus, the wound edges are sutured together. Recurrence is approximately 15%.
5. Cystectomy With Secondary Healing
The cyst is fully excised and the wound is left open to heal naturally over 1–2 months. It requires daily wound care. Recurrence rate: 1–6%.
6. Microsinusectomy
Ideal for small sinuses. The sinus is removed with its capsule and closed primarily. Recurrence is around 15%.
7. Flap Techniques (Limberg, Rotation, Z-plasty)
Known as “closed surgery.” Tissue is mobilized to cover the defect when direct closure is not possible. These methods have the lowest recurrence rates (0–3%), less tension on the wound, reduced postoperative pain, and faster return to daily life.
8. Endoscopic Pilonidal Sinus Treatment (EPSiT)
A minimally invasive technique in which a small camera is used to enter and thermally ablate the sinus under direct vision. It offers minimal pain and rapid recovery. Recurrence is similar to laser therapy.
Postoperative Care
Hygiene is essential after pilonidal surgery. Keeping the area clean reduces the risk of infection and speeds healing. Patients should walk as early as possible but avoid putting direct pressure on the wound during the first week.
Healing Process After Surgery
Frequent dressing changes are necessary. Most patients recover within 7–10 days, but complete wound healing (if left open) may take 1–2 months. Microsinusectomy generally heals faster.
How to Prevent Pilonidal Disease
Pilonidal disease can often be prevented by maintaining proper hygiene and reducing friction in the area.
Prevention tips:
- Maintain good hygiene
- Avoid tight underwear
- Sit with proper posture
- Maintain a healthy weight
How to Relieve Pilonidal Cyst Symptoms
If infection is present, surgical drainage is required. Without infection, warm sitz baths and good hygiene may reduce symptoms.
Ways to relieve discomfort:
- Warm sitz baths
- Using cushions to reduce pressure while sitting
- Regular exercise to improve circulation
- Vitamin supplements (C, zinc, vitamin A)
- Essential oils such as diluted tea tree oil (consult a doctor first)
Which Doctor Treats Pilonidal Disease?
Pilonidal disease should be treated by a general surgeon, as the definitive management is surgical.
Frequently Asked Questions
How does pilonidal disease develop?
Loose hairs or debris accumulate in the cleft of the buttocks. Friction pushes the hair into the skin, forming an abscess.
How do I know if I have a pilonidal cyst?
Pain when sitting, swelling, redness, abscess formation, and foul-smelling drainage are key signs.
Are symptoms different in women?
Symptoms are similar in men and women. Laser hair removal may help reduce recurrence in women.
Who is at risk?
Most commonly affects men aged 15–35. Higher rates are seen in professions requiring prolonged sitting (drivers, office workers, barbers, animal groomers).
Can a pilonidal cyst be popped?
No. Draining it at home does not solve the problem. It increases the risk of infection and scarring. The cyst contains hair and debris that cannot be removed by squeezing.
Can pilonidal disease become serious?
Rarely, long-standing untreated disease can develop into cancer (squamous cell carcinoma).
Is pilonidal surgery difficult?
Most procedures can be performed under local anesthesia. Healing is usually fast because the incisions are small.
Where else can pilonidal cysts occur?
Although most common at the tailbone, they can appear in:
- Armpits
- Groin
- Belly button
Difference between pilonidal cyst and ingrown hair
- Pilonidal cyst: Hair shed from other body regions accumulates in the tailbone and penetrates the skin.
- Ingrown hair: A hair on the skin surface grows inward rather than outward; usually called “razor bump” or “ingrown hair.”
They are completely different conditions.
