If you’ve found a smooth, firm lump under your skin, it’s most likely a common skin cyst, and the single best thing you can do is leave it alone. Most skin cysts are harmless, painless, and don’t require treatment unless they become inflamed, infected, or bothersome. But knowing what you’re dealing with, what not to do, and when removal makes sense can save you from unnecessary pain and scarring.
Identify What Kind of Cyst You Have
The lumps most people call “cysts” are technically epidermoid or pilar cysts. Both appear as smooth bumps just under the skin’s surface and contain a thick, white, toothpaste-like substance made of keratin, the same protein in your hair and outer skin. They’re often mistakenly called “sebaceous cysts,” but they don’t actually involve oil-producing glands.
Where the cyst shows up is a good clue to its type. Epidermoid cysts tend to appear on the face, neck, chest, upper back, and sometimes the groin area. Pilar cysts are most common on the scalp. The difference between them is microscopic, in the type of cells that form the cyst’s lining, but the treatment approach is the same for both.
A cyst that isn’t growing, isn’t red, and isn’t painful is generally fine to monitor at home. Many people live with small cysts for years without any problems.
Why You Should Never Pop a Cyst
Squeezing, poking a needle into, or cutting open a cyst at home is one of the worst things you can do. It introduces bacteria directly into the tissue, which often leads to infection. An infected cyst becomes red, swollen, hot, and painful, turning a minor cosmetic nuisance into something that needs antibiotics or emergency drainage.
Even if you manage to push the contents out, the cyst will almost certainly come back. That’s because a cyst isn’t just a pocket of fluid. It has an outer lining, or capsule, that acts like a balloon. Squeeze the contents out and the balloon is still there, ready to fill up again. Only removing the entire capsule prevents recurrence. Home drainage also tends to cause scarring that’s worse than what a clean surgical removal would leave behind.
What You Can Do at Home
If your cyst is mildly inflamed or uncomfortable, warm compresses are the safest home remedy. Apply a warm, wet washcloth to the area for 20 to 30 minutes, three to four times a day. Keep the water at bath temperature or below. This can help reduce swelling and may encourage a superficial cyst to drain on its own through the skin’s surface.
Beyond warm compresses, keep the area clean with gentle soap and water. Don’t apply pressure, don’t wrap it tightly, and resist the urge to “work” the lump with your fingers. If the cyst does drain on its own, gently clean the area and cover it with a light bandage.
When Removal Makes Sense
You don’t need to remove every cyst. But removal is worth considering if the cyst keeps getting inflamed, is in a visible or uncomfortable spot (like under a waistband or bra strap), is growing steadily larger, or has become infected more than once. Some people also choose removal simply because the lump bothers them cosmetically.
There are two main approaches a provider can take, and understanding the difference matters because it affects whether the cyst comes back.
Drainage
In this procedure, a provider numbs the skin with a local anesthetic, makes a small cut, and drains the contents. It’s quick, provides immediate relief if the cyst is painful or tense, and the wound is covered with gauze. The downside: because the capsule stays in place, the cyst can refill over time. Drainage is typically a temporary fix, often used when a cyst is actively infected and too inflamed for full removal.
Surgical Excision
This is the definitive treatment. After numbing the area, the provider makes a slightly larger incision and removes the entire cyst, capsule and all, in one piece. The wound is closed with stitches. Because the lining is gone, the cyst has no structure to refill. This is the only reliable way to prevent recurrence.
For cysts that are inflamed but not infected, a provider may inject a small amount of steroid directly into the cyst to calm the swelling first. This can shrink the inflammation enough to allow a cleaner surgical removal later.
Recovery After Removal
Cyst removal is an outpatient procedure done under local anesthesia. You’re awake the whole time and go home the same day. Small cysts that don’t require stitches typically heal within a few days to two weeks. Larger cysts with bigger incisions can take several weeks, and in some cases a few months, to fully heal.
During recovery, you’ll keep the wound clean and dry, change bandages as instructed, and watch for signs of infection like increasing redness, warmth, or discharge. Most people return to normal activities within a day or two, though you may want to avoid heavy exercise or anything that stretches or puts pressure on the area until stitches are removed.
Can You Prevent Cysts From Forming?
There is no known way to prevent epidermoid or pilar cysts from forming. They develop when skin cells that normally shed to the surface instead move deeper and multiply, creating that characteristic lining. Some people are simply more prone to them, and there’s a genetic component, especially with pilar cysts on the scalp.
What you can control is preventing complications. Leaving cysts alone, not squeezing or picking at them, is the most effective way to avoid infection and scarring. If you notice a new lump that’s hard, irregularly shaped, rapidly growing, or fixed to deeper tissue rather than moving freely under the skin, that’s worth getting evaluated promptly, as those features aren’t typical of a benign cyst.