Most cysts under the skin don’t need emergency treatment, but they rarely go away on their own. A subcutaneous cyst is a small, enclosed sac filled with material like keratin (the same protein that makes up your hair and nails), and the only way to permanently get rid of one is to remove the entire sac. Everything short of that, from warm compresses to drainage, is either managing symptoms or buying time.
What You’re Dealing With
The most common type of cyst under the skin is an epidermoid cyst. These show up most often on the face, neck, and trunk, though they can form virtually anywhere on the body. They typically feel like a firm, round lump just beneath the surface, and they’re filled with a yellowish, cheese-like material made of compacted skin cells. They grow slowly, often over months or years, and are almost always benign.
People sometimes call these “sebaceous cysts,” but true sebaceous cysts are actually rare. The distinction doesn’t change much about treatment, but it’s worth knowing that what you’re feeling is most likely an epidermoid cyst or a pilar cyst (a similar type common on the scalp). Both are enclosed in a lining, like a tiny balloon under your skin. That lining is the reason they keep coming back if they’re not fully removed.
What You Can Do at Home
If your cyst is small, painless, and not inflamed, the simplest approach is to leave it alone. Many people live with small cysts for years without any problems. But if a cyst becomes tender, swollen, or red, a warm compress can help bring down the inflammation and sometimes encourage the cyst to drain on its own.
The American Academy of Dermatology recommends soaking a clean cloth in hot water and applying it for 10 to 15 minutes, three times a day. This increases blood flow to the area and can soften the contents of the cyst. Be patient: it may take several days of consistent compresses before you notice any change.
What you should never do is squeeze or try to pop a cyst yourself. Unlike a pimple, a cyst sits deeper in the skin, and squeezing it can push its contents further into surrounding tissue, triggering a painful inflammatory reaction or an infection. Using a needle or blade at home carries the same risks, plus the chance of scarring.
When Drainage Makes Sense
If a cyst becomes large, painful, or visibly inflamed, a doctor can drain it in the office. The procedure is straightforward: after numbing the area with a local anesthetic, the provider makes a small cut in the skin, empties the cyst’s contents, then covers the site with gauze and a bandage. You’ll feel pressure but not pain during the process, and it usually takes under 30 minutes.
Drainage provides fast relief, especially for an inflamed or infected cyst. But here’s the catch: draining a cyst does not remove its lining. That means the sac is still there, still capable of refilling. Recurrence after drainage alone is common. One study on a similar type of cyst found a 14% recurrence rate within 12 months when the sac wasn’t fully removed. In practice, many dermatologists report even higher rates for epidermoid cysts that are simply drained without excision.
Drainage is often used as a first step when a cyst is too inflamed to safely remove in one piece. Once the inflammation settles over a few weeks, the doctor can schedule a full removal.
Surgical Excision: The Permanent Fix
Complete surgical excision is the only treatment that reliably prevents a cyst from coming back. During the procedure, the provider numbs the area, makes an incision sized to the cyst, and removes the entire cyst in one piece, including its lining. The wound is then closed with stitches and bandaged.
This is still a minor, in-office procedure. It’s done under local anesthesia, and most people go home the same day. The key difference from simple drainage is that the surgeon takes out the entire sac wall. If even a small fragment of the lining remains, the cyst can regrow. An experienced provider performing a clean excision brings the recurrence rate close to zero.
Recovery depends on the size and location of the cyst. You’ll have stitches that typically need to come out within one to two weeks. During that time, you’ll want to keep the area clean and dry, and avoid strenuous activity that could pull on the wound. Most people return to normal daily activities within a day or two, with full healing over a few weeks. Larger cysts or those in areas with a lot of movement (like the back or groin) may take slightly longer.
Steroid Injections for Inflammation
If a cyst is red, swollen, and painful but not clearly infected, a doctor may offer a steroid injection directly into the cyst. This works by suppressing the inflammatory response: it reduces blood flow to the area, limits the activity of immune cells driving the swelling, and slows the growth of tissue around the cyst. The effect is a noticeable reduction in size and tenderness, often within 24 to 48 hours.
Steroid injections don’t eliminate the cyst. They’re a tool for calming things down, either as a bridge to surgical removal or as a way to manage a cyst that isn’t a good candidate for immediate surgery. They work best on inflamed cysts that aren’t actively infected.
Signs of Infection to Watch For
An infected cyst is a different situation from an inflamed one, and it requires faster action. The signs overlap but tend to be more intense: spreading redness and warmth around the cyst, increasing pain, pus or foul-smelling discharge, and sometimes fever or chills. If the redness is expanding outward from the cyst, that suggests the infection is spreading into surrounding skin tissue, a condition called cellulitis.
A cyst that’s warm, painful, and leaking pus needs medical attention. If you also develop a fever or notice the redness spreading rapidly, seek care urgently. Antibiotics are sometimes necessary for infected cysts, particularly when there are signs of cellulitis or when infections keep recurring. In many cases, an infected cyst also needs to be drained to clear the trapped material that’s fueling the infection.
Choosing the Right Approach
Your best option depends on the cyst’s current state. A small, painless cyst that doesn’t bother you can simply be monitored. If it’s cosmetically annoying or in an area where it gets irritated (under a waistband, along a bra strap), elective excision is the cleanest solution. For an inflamed cyst, warm compresses and possibly a steroid injection can settle things down enough for a planned removal. For an infected cyst, drainage and antibiotics come first, with excision scheduled once healing is complete.
The one thing all dermatologists agree on: if you want a cyst gone for good, the entire sac has to come out. Everything else is symptom management. That’s not a bad thing when you need relief now, but it helps to know that drainage or injections alone are buying time rather than solving the problem permanently.