Most cysts under the skin won’t go away on their own, and the only way to permanently remove one is to have the entire sac surgically taken out. That said, not every cyst needs surgery. Small, painless cysts can often be managed at home or simply monitored, while infected or growing cysts need medical attention. Your options depend on the cyst’s size, location, and whether it’s causing symptoms.
What You’re Actually Dealing With
The vast majority of lumps people call “cysts under the skin” are epidermoid cysts, sometimes mislabeled as sebaceous cysts. These are small, enclosed sacs sitting just beneath the surface of the skin, filled with a protein called keratin (the same material your skin and nails are made of). They typically show up on the face, neck, and trunk, though they can appear almost anywhere on the body.
A typical epidermoid cyst feels like a firm, movable bump ranging from half a centimeter to several centimeters across. Many have a small dark dot at the center, called a punctum. They’re usually painless and grow very slowly. The trouble starts if one ruptures under the skin or gets infected: it becomes red, swollen, tender, and sometimes drains thick, yellow, foul-smelling material.
What You Can Do at Home
If your cyst is small, painless, and not inflamed, the most effective home treatment is applying a warm, wet washcloth to it for 20 to 30 minutes, three to four times a day. The warmth increases blood flow to the area and can help the cyst drain on its own over time, particularly if it has a visible opening. It also helps reduce mild inflammation and discomfort.
What you should never do is squeeze, pop, or try to lance a cyst yourself. Unlike a pimple, a cyst sits deeper in the skin and has a tough lining that won’t break apart from pressure alone. Squeezing can rupture the sac internally, pushing its contents into surrounding tissue and triggering a painful inflammatory reaction. Worse, breaking the skin creates an entry point for bacteria. Case reports in the medical literature have documented infected cysts leading to necrotizing fasciitis, a rapidly spreading and life-threatening soft tissue infection. The risk is rare, but it underscores why self-surgery with needles, pins, or fingernails is a genuinely bad idea.
When a Cyst Needs Medical Treatment
You should have a cyst evaluated if it becomes painful, red, or swollen, if it starts draining fluid, if it grows larger than about 5 centimeters (roughly 2 inches), or if it changes color. Rapid growth or recurrent irritation from clothing or movement are also reasons to get it looked at. A doctor may also want to examine any cyst where the diagnosis is uncertain, since other types of lumps can mimic cysts.
How Doctors Remove Cysts
There are two main approaches, and they have very different outcomes.
Drainage
A doctor numbs the area, makes a small cut, and squeezes out the cyst’s contents. This provides quick relief, especially for an infected or painful cyst, but it’s not a permanent fix. Because the sac lining stays behind under your skin, the cyst frequently fills back up over weeks or months. Drainage is best thought of as a short-term solution, often used to calm down an active infection before a more definitive procedure.
Surgical Excision
This is the standard cure. The doctor removes the entire cyst, including its lining, through an incision in the skin. When the full sac is taken out, the recurrence rate drops to around 3%. Compare that to incomplete removal, where roughly 21% of cysts come back. The procedure is typically done in an office under local anesthesia and takes 15 to 30 minutes depending on the cyst’s size and location.
For smaller cysts, some dermatologists use a minimal excision technique. Instead of a traditional incision, they create a tiny opening (2 to 3 millimeters), extract the contents, then carefully scrape out and pull the cyst wall through the small hole. In one study, wounds closed within seven days and left only a pinpoint scar similar to an acne mark, with no recurrences or infections. This approach is especially appealing for cysts on visible areas like the face.
Steroid Injections for Inflammation
If a cyst is inflamed but not infected, a doctor may inject a small amount of a corticosteroid directly into it. This calms the swelling and pain without surgery, buying time or making a future excision easier. It doesn’t remove the cyst permanently.
Recovery and Scarring
After a standard excision, you can expect a sutured incision that takes one to two weeks to heal on the surface, with full strength returning over several more weeks. The scar’s visibility depends heavily on where the cyst was. Trunk and back incisions tend to heal with wider scars than facial ones, partly because the skin is thicker and under more tension from movement.
The most common complications are minor: temporary soreness, mild infection at the wound site, or the incision edges separating slightly. These typically resolve within a few months. Nerve-related issues like numbness or tingling are uncommon but more of a concern for cysts removed from the back of the scalp near the base of the skull, where sensory nerves run close to the surface. One study found that cysts in that region carried an 18-fold higher risk of sensory complications compared to cysts on the top of the head.
Cost and Insurance Coverage
If your cyst is purely cosmetic, meaning it’s not painful, infected, or growing, insurance may not cover removal. Insurers generally classify cyst removal as medically necessary when a doctor documents pain, bleeding, infection, recent enlargement, drainage, or functional problems like a cyst near the eye interfering with vision or tear flow.
Without insurance, removal costs vary widely by size and location. A small cyst (under half a centimeter) on the face might cost $209 to $776. Larger cysts over 4 centimeters can run up to $3,019. With insurance coverage, out-of-pocket costs for those same procedures drop to roughly $41 to $155 for small cysts and around $600 for the largest ones. If you want removal covered, the key is making sure your doctor documents why the cyst is a medical problem, not just a cosmetic concern.
Why Cysts Come Back
The single most important factor in whether a cyst returns is whether the entire sac lining was removed. Think of the lining as a balloon under your skin. If a doctor drains the fluid but leaves the balloon in place, it simply refills. Even with surgical excision, if a small fragment of the wall is left behind, that fragment can regenerate and produce a new cyst in the same spot. This is why complete excision, ideally when the cyst is not actively inflamed, gives you the best odds of a one-and-done removal.