Why Do I Have a Lump on My Buttocks?

A lump on your buttocks is often a blocked pore, an inflamed hair, or a cyst, but fever, fast growth, or anus pain needs prompt care.

Finding a bump on your buttocks can throw you off. It’s a spot that deals with pressure, sweat, friction, and hair. Those basics alone can turn a tiny clogged pore into a sore lump. A lot of buttock lumps are minor and settle with simple home steps. Some don’t, and the timing of care matters.

This page helps you sort the common causes, spot red flags, and pick the safest next move. If you’re staring at the mirror asking, “why do i have a lump on my buttocks?”, start with the quick checks below.

Fast Checks You Can Do In Two Minutes

These quick clues help you tell a skin bump from a deeper issue.

Location: Is it on the cheek, in the crease, near the tailbone, or close to the anus?
Feel: Soft and movable under the skin can point to a fatty lump. Firm, tender, and warm can point to infection.
Skin change: Redness, a white head, crust, or drainage leans toward a boil or abscess.
Pain pattern: Sharp pain with sitting can fit a pilonidal problem near the tailbone. Throbbing near the anus can fit a perianal abscess.
Time: A lump that shows up fast over hours to days often ties to inflammation or infection. A slow lump over months is often non-urgent, yet still worth a check.
Whole-body signs: Fever, chills, or feeling sick can go with infection that needs care soon.

Possible Cause	Common Clues	What People Often Do First
Boil	Red, tender lump; may form a head; can drain pus	Warm compress, keep clean, avoid squeezing
Skin abscess	Deeper, painful swelling; warmth; may feel “full”	Seek care for drainage if worsening
Folliculitis	Small sore bumps around hairs; itch or sting	Pause shaving, gentle wash, loose clothing
Epidermoid cyst	Round, under-skin bump; may have a tiny dark center	Leave it alone; book a visit if it grows or hurts
Pilonidal cyst	Lump near tailbone crease; pain with sitting; drainage	Keep area clean; seek care if painful or draining
Hematoma	Lump after a fall or impact; bruising; sore pressure	Cold pack early, rest, watch size
Lipoma	Soft, rubbery, movable lump; often not painful	Track size; routine check if changing
Perianal abscess	Severe pain near anus; swelling; fever possible	Get urgent care, do not wait

Why Do I Have a Lump on My Buttocks? With The Most Common Causes

The buttocks area has thick skin, sweat glands, and lots of hair follicles. Add long sitting, tight fabric, gym sessions, and shaving, and you get a perfect setup for blocked pores and irritated follicles. The causes below are listed by how often they show up in clinics.

Boils And Skin Abscesses

A boil is an infected hair follicle that forms a painful lump with pus. It may start as a tender red bump, then grow, then form a head. A deeper pocket of pus is often called an abscess. Both can show warmth and throbbing pain.

Home care can help early. Warm compresses can ease pain and may help drainage. Keep the area clean, wash hands after touching it, and use a clean cloth each time. Don’t squeeze or poke it. That can push germs deeper and widen the infection.

If you want a clear baseline for what a boil is and what signs mean “get checked,” the NHS boils page lays it out in plain language: NHS boils.

Folliculitis From Sweat, Friction, Or Shaving

Folliculitis is inflammation around hair follicles. It can look like a cluster of small red bumps or tiny pimples. It may itch, sting, or feel sore when you sit. This often shows up after shaving, waxing, long sweaty days, or tight shorts that rub.

Simple moves help: pause shaving for a bit, wear loose breathable fabric, shower after sweating, and keep towels and underwear clean. If bumps keep coming back in the same spots, a clinician can check for a deeper infection or another skin condition.

Epidermoid Cysts

An epidermoid cyst is a slow-growing, under-skin lump. It often feels round and firm. Some have a tiny dark dot at the center. It can stay quiet for years. It can also get inflamed, swell, and hurt if it ruptures or gets infected.

Try not to pop it. Squeezing can inflame the wall of the cyst and make swelling worse. If it’s painful, keeps growing, or drains foul-smelling material, a clinician can remove it or treat infection if present.

Pilonidal Cysts Near The Tailbone Crease

If your lump sits high in the buttock crease near the tailbone, pilonidal disease is a common suspect. It can start as a tender lump, then turn into a draining spot. People often notice pain when sitting, plus swelling or discharge in the crease.

Hair and friction in the crease can play a role. Keeping the area clean and dry can help day to day. When it’s painful, draining, or recurring, it often needs medical care.

Mayo Clinic’s pilonidal cyst page is a solid reference for symptoms and causes: Mayo Clinic pilonidal cyst symptoms.

Lipomas And Other Soft Tissue Lumps

A lipoma is a benign fatty growth under the skin. It tends to feel soft, rubbery, and movable. It often doesn’t hurt. Lots of people live with one for years and only notice it when it gets larger or sits in a spot that rubs.

Even with a lump that feels like a lipoma, it’s smart to get a routine check if it changes fast, becomes painful, feels fixed in place, or comes with skin change.

Hematoma After A Knock Or Fall

If you slipped, got hit during sport, or sat hard on a corner, a bruise can form a lump called a hematoma. It can feel tender and firm. You might see purple or yellow skin color change.

Cold packs early can help swelling. After a day or two, gentle warmth can ease soreness. If the lump keeps expanding, becomes hot and red, or you take blood thinners, get checked.

Lumps Near The Anus

A lump close to the anus can be from several issues. Hemorrhoids can feel like a tender bump at the opening. A perianal abscess can cause deep pain, swelling, and fever. A painful lump in this area is not a “wait it out” situation when pain is strong, when fever is present, or when you can’t sit or sleep.

Signs That Mean You Should Get Care Soon

Some clues point to infection that needs quick treatment or a lump that needs a proper exam.

Fever, chills, or feeling ill
Fast growth over a day or two
Severe pain, warmth, spreading redness, or red streaks
Drainage that smells bad or keeps soaking dressings
Lump near the anus with deep, constant pain
New lump with unexplained weight loss or night sweats
Lump that feels hard, fixed, and keeps enlarging
Repeated lumps in the same groin or buttock zones
Diabetes, weak immune system, or current cancer treatment

If any of these fit, same-day care is often the safest call. If the lump is close to the anus and pain is intense, urgent evaluation is the safer path.

What You Can Do At Home Without Making It Worse

Home steps help when the lump seems mild, you feel well, and there are no red flags.

Warm Compress Routine For Tender Skin Lumps

Warm, moist compresses can ease pain and may help a boil soften. Use clean cloths. Aim for 10 to 15 minutes, a few times a day. Stop if heat makes it throb more.

Hygiene That Helps Without Harsh Scrubbing

Use a gentle wash and rinse well. Pat dry. Skip harsh scrubs on a sore bump. Change underwear daily. Don’t share towels. If you work out, shower soon after.

Clothing And Sitting Fixes

Loose, breathable fabric reduces friction. If sitting hurts, shift pressure with a soft cushion, then get up to walk every hour. For bumps in the crease, keeping the area dry after bathing can help.

What Not To Do

Don’t squeeze, lance, or pick at the lump.
Don’t use random “drawing salves” on broken skin.
Don’t tape gauze on raw skin without a skin-safe barrier.
Don’t keep shaving over inflamed follicles.

What A Clinician May Do At A Visit

Many buttock lumps are diagnosed by a quick exam and a few questions: how long it’s been there, how fast it grew, pain level, drainage, fever, and any recent shaving or injury. The next step depends on what it looks and feels like.

For a boil or abscess, drainage can be the main treatment when a pus pocket is present. Antibiotics may be used in some cases, like spreading redness, fever, or higher risk health conditions. For a cyst, removal may be offered if it keeps recurring or gets inflamed. For pilonidal disease, care ranges from drainage to planned procedures, based on severity and recurrence.

How To Lower The Odds Of Another Lump

Recurrence is common with follicle and cyst problems, so small habit changes can pay off.

Shower after sweating and change out of damp clothing.
Use breathable underwear and avoid tight seams that rub.
If you shave, use a clean blade, shave with the grain, and pause when bumps appear.
Keep the buttock crease clean and dry, especially after workouts.
If you sit all day, stand up often and shift pressure points.

Symptom Pattern	Likely Next Step	Why That Step Fits
Small itchy bumps around hairs	Home care and shaving break	Often follicle irritation that settles with less friction
Single red tender lump with a head	Warm compress, watch closely	Early boil may drain on its own with gentle heat
Deep painful swelling, warmth, throbbing	Same-day evaluation	Abscess often needs drainage to heal
Round under-skin lump that grows slowly	Routine appointment	Cyst or lipoma is common and needs a simple exam
Lump high in crease near tailbone	Check for pilonidal disease	Location and sitting pain match that pattern
Lump near anus with severe pain	Urgent care	Perianal abscess can worsen fast
Fever plus spreading redness	Same-day evaluation	Could be cellulitis with deeper infection risk
Lump that is hard, fixed, enlarging	Prompt exam	Needs assessment to rule out rare causes

A Simple Plan For The Next 48 Hours

If you still feel stuck on “why do i have a lump on my buttocks?”, this is a safe, plain plan when you feel well and red flags are absent.

Take a clear photo for your own tracking, then stop poking it.
Use warm compresses 2 to 4 times daily if it’s tender.
Keep it clean, dry, and covered with a light dressing if it rubs.
Wear loose clothing and cut down on long sitting blocks.
Track size, pain, redness, and any drainage.
Book care sooner if pain ramps up, redness spreads, or you feel ill.

If you notice rapid change, fever, or a painful lump close to the anus, don’t wait. If the lump keeps returning, ask for a plan that fits your pattern, not a one-off fix.

One last note, since people often type it again while searching: why do i have a lump on my buttocks? The answer is usually skin, hair, or a cyst. The safest move is matching your symptoms to the right level of care.

Founder & Lead Editor

Mo Maruf

I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.

Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.