Most cysts on the back are epidermal inclusion cysts, slow-growing lumps that form when skin cells get trapped beneath the surface and accumulate inside a small sac. The only way to permanently get rid of one is to have the entire sac surgically removed. Without removing that lining, the cyst almost always fills back up over time. That said, not every back cyst needs immediate removal, and there are safe ways to manage discomfort at home while you decide on next steps.
What That Lump Actually Is
The bump you’re feeling is most likely an epidermoid cyst, often mistakenly called a sebaceous cyst. It’s a pocket of skin cells that got pushed inward instead of shedding normally. The cells keep multiplying inside the sac, producing a thick, yellowish material that gives the cyst its firmness. These cysts are benign, meaning they aren’t cancerous, and they can sit quietly under your skin for months or years without causing problems.
Back cysts tend to grow slowly and range from pea-sized to several centimeters across. You might notice a small dark dot at the center, which is the opening of the sac. They’re usually painless unless they become inflamed or infected, at which point they can swell, turn red, and feel tender to the touch.
Why You Should Not Pop It Yourself
Squeezing, lancing, or trying to drain a cyst at home is the single most common mistake people make. Even if you manage to push out some of the contents, you’ll leave the sac wall intact, and the cyst will refill. Worse, breaking the skin with unsterile tools introduces bacteria directly into the wound. An infected cyst causes swelling, pain, and skin discoloration, and can turn a minor nuisance into something that requires antibiotics or emergency drainage.
Popping a cyst can also rupture the sac internally, spilling its contents into the surrounding tissue. This triggers a strong inflammatory reaction that makes the area more painful and harder to treat surgically later. It also increases the chance of scarring. Leave the cyst intact.
Safe Home Care While You Wait
If the cyst is inflamed or uncomfortable, warm compresses are the safest thing you can do at home. Soak a clean washcloth in warm water (no hotter than bath temperature) and hold it against the cyst for 20 to 30 minutes, three to four times a day. This can help reduce swelling and occasionally encourage the cyst to drain on its own through its natural opening. Keep the area clean and avoid tight clothing that rubs against the lump.
Warm compresses won’t make the cyst disappear permanently, but they can shrink an inflamed one enough to relieve pressure and buy you time before a medical appointment. If you notice increasing redness spreading outward from the cyst, pus draining on its own, or worsening pain, that’s a sign of infection that needs professional treatment sooner rather than later.
How Doctors Remove a Back Cyst
Surgical excision is the standard treatment for a cyst you want gone for good. It’s typically done in an office or outpatient setting and takes less than an hour. Your provider numbs the area with a local anesthetic, makes an incision sized to the cyst, removes the entire cyst in one piece (sac and all), then closes the skin with stitches and a bandage. You’re awake the whole time and can usually drive yourself home.
The key detail is removing the sac completely. If any portion of the lining stays behind, the cyst can fill up again over time. This is why drainage alone, where a doctor cuts the cyst open and empties it but doesn’t remove the wall, has a higher recurrence rate. Full excision is the more definitive option.
For cysts that are actively inflamed, your doctor may first inject a corticosteroid directly into the cyst to calm the swelling before scheduling removal. This makes the excision cleaner and reduces the risk of complications. The injection itself requires careful dosing, because too much fluid can rupture the cyst wall and worsen inflammation.
Recovery After Removal
Recovery from a back cyst excision is straightforward. You’ll have stitches and a bandage over the site. Most people return to normal activities within a day or two, though you’ll want to avoid heavy lifting or movements that stretch the skin around the incision until the stitches come out, typically within one to two weeks depending on the size and location. The back is a high-tension area for skin, so your provider may recommend keeping the wound supported a bit longer to minimize scarring.
Keep the incision clean and dry as directed. Some mild soreness, swelling, and bruising around the site is normal for the first few days. A small scar is expected, and its visibility depends on the cyst’s size and your skin’s healing tendencies.
What It Costs
The price of cyst removal varies widely depending on the cyst’s size and location. For a small cyst (half a centimeter or less), costs range from roughly $209 to $776 without insurance. Larger cysts, over 4 centimeters, can cost up to $3,000. If your insurance or Medicare covers the procedure, out-of-pocket costs drop significantly, sometimes to under $200 for smaller cysts. Coverage often depends on whether the cyst is considered medically necessary to remove (infected, painful, or rapidly growing) versus cosmetic.
Most removals are done in a dermatologist’s office rather than a hospital, which keeps costs lower. Call your insurance ahead of time and ask whether the procedure code for cyst excision is covered under your plan.
Preparing for Your Appointment
Before your visit, make a list of any medications, vitamins, or supplements you take, since blood thinners and certain supplements can increase bleeding during the procedure. Note any recent skin injuries near the cyst, and mention if the cyst has changed size, become painful, or drained on its own. Your doctor will want that history to decide whether to excise it immediately or manage inflammation first.
Most importantly, resist the urge to squeeze or manipulate the cyst before your appointment. Arriving with an intact, non-inflamed cyst gives your provider the cleanest surgical field and the best chance of removing the sac completely in one attempt.
Can You Prevent Cysts From Coming Back?
There’s no guaranteed way to prevent new epidermal cysts from forming. They develop when skin cells grow inward instead of shedding, and this can happen to anyone. Some people are simply more prone to them. Keeping your back clean, exfoliating gently to prevent clogged pores, and avoiding tight, friction-heavy clothing may help reduce the chance of new cysts forming, but none of these measures are proven to eliminate the risk entirely.
What you can control is recurrence at the same site. If you’ve had a cyst drained but not fully excised, there’s a good chance it will refill. The most reliable way to prevent a cyst from returning in the same spot is complete surgical removal of the sac wall. If a cyst does come back after excision, it likely means a small piece of the lining was left behind, and a second excision can usually resolve it.