Pilonidal cyst laser treatment

At a glance

Laser treatment for pilonidal sinus — sometimes called SiLaC (sinus laser closure) or FiLaC (fistula laser closure) — is a minimally invasive alternative to traditional open surgery. Instead of cutting out the sinus tract with a wide excision, a laser fibre is used to destroy the tract lining from the inside, allowing it to close.

The appeal is straightforward: a smaller wound, less pain, and faster recovery. The trade-off is that it is newer, less widely available, and long-term recurrence data is still developing.

This guide covers how it works, who it may suit, and what people describe about the experience.

How the procedure works

The basics

1. The procedure is done under local, regional, or general anaesthesia depending on the surgeon and the complexity of the sinus
2. The sinus tract is cleaned out — any hair, debris, and infected tissue is removed
3. A thin laser fibre is inserted into the tract
4. The laser is activated as the fibre is slowly withdrawn, destroying the tract lining and causing thermal damage that leads to closure
5. The small entry wound is closed or left to heal

What it does differently

Traditional pilonidal surgery typically involves either:

• Wide excision — cutting out the entire sinus with a margin of healthy tissue, leaving an open wound
• Excision with closure — cutting out the sinus and stitching the wound shut

Both approaches create larger wounds. Laser treatment avoids this by working from inside the tract rather than cutting it out from the outside.

Who it may suit

Laser treatment tends to be most appropriate for:

• Primary (first-time) pilonidal sinus without active infection
• Relatively simple tracts — a single, well-defined sinus pathway
• People who want to minimise recovery time — particularly if work or other commitments make a long recovery difficult
• People who have had problems with open wound healing in the past

It may be less suitable for:

• Active abscess — an abscess usually needs drainage first, with definitive treatment later
• Complex or branching sinuses — multiple tracts may be harder to treat thoroughly with laser
• Recurrent pilonidal disease — though some surgeons do offer laser for recurrence, the evidence is less robust
• Very large sinuses — extensive disease may need a more comprehensive approach

What people report about recovery

The first few days

• Mild to moderate pain — consistently described as less than open surgery
• A small wound — often just a few millimetres, compared to wounds of several centimetres with excision
• Minimal wound care — keeping the area clean and dry is usually sufficient
• Able to sit — with some discomfort, but much earlier than after open surgery

The first few weeks

• Return to work — many people describe going back within one to two weeks
• Physical activity — light activity resumed sooner than with traditional surgery
• Wound healing — the small wound typically closes within two to four weeks
• Less impact on daily life — the difference compared to open surgery is significant

What people wish they had known

• That availability can be limited and waiting lists may be longer for this specific procedure
• That not all pilonidal sinuses are suitable for laser treatment
• That the procedure is relatively quick but the assessment beforehand matters — imaging may be needed to map the sinus tract
• That success is not guaranteed — recurrence can still happen

The evidence

Laser treatment for pilonidal sinus has been studied in multiple clinical series, with generally favourable results:

• Healing rates in the range of 70 to 90 percent for primary cases
• Significantly less pain than open excision
• Faster return to normal activities
• Lower complication rates in most studies

However, the evidence base is still growing. Most studies are relatively small, and long-term follow-up (five years or more) is limited compared to traditional surgery, which has decades of data behind it.

Questions to ask your surgeon

If you are considering laser treatment, useful questions include:

• Is my sinus anatomy suitable for laser?
• How many of these procedures have you performed?
• What is your personal success and recurrence rate?
• What happens if the laser treatment does not work — what is the next step?
• Is any imaging needed before the procedure?
• What aftercare will I need?

Comparing your options

Laser treatment is one of several approaches to pilonidal sinus. There is no single best option — the right choice depends on the complexity of your sinus, your surgeon’s experience, your recovery constraints, and your preferences.

Having a clear conversation with your surgeon about why they recommend a particular approach — and what the alternatives are — helps you make an informed decision.