Medically reviewed by Prof. Dr. Zahid Mahmood, MBBS, FCPS — General, Laparoscopic & Laser Surgeon, Lahore.
A lipoma is a benign lump made of mature fat cells. It usually feels soft, grows slowly and moves slightly beneath the skin. Lipomas are common, harmless and often need no treatment.
Even so, every new or changing lump deserves proper assessment. A lump that is enlarging, painful, firm, fixed or deep may need imaging and sometimes a biopsy to exclude another soft-tissue condition.
What is a lipoma?
A lipoma is a non-cancerous fatty tumour, most often situated in the layer beneath the skin. It is usually surrounded by a thin capsule and grows separately from the surrounding normal fat. Lipomas can occur almost anywhere, but they are frequently found on the shoulders, upper arms, chest, back, neck, thighs and buttocks.
A lipoma is not simply an area of general weight gain. Losing weight usually does not make an established lipoma disappear, and people of any body size can develop one.
What does a typical lipoma feel like?
A typical superficial lipoma is:
- Soft or rubbery
- Round or oval
- Located just beneath normal-looking skin
- Slightly mobile when gently pressed
- Usually painless
- Slow-growing over months or years
Some lipomas are tender because of their position, pressure on nearby structures or a variant containing more blood vessels. A painful lump should still be examined rather than assumed to be harmless.
Can a person have several lipomas?
Yes. Some people develop multiple lipomas, occasionally because of an inherited tendency called familial multiple lipomatosis. Each lump should be assessed on its own features. One lump that behaves differently from the others—particularly if it grows rapidly, becomes firm or causes pain—needs fresh evaluation.
What causes lipomas?
The exact cause is usually unknown. Family history plays a role in some people. Lipomas are not caused by poor hygiene, infection or eating fatty food, and there is no proven lifestyle method that reliably prevents them.
Patients sometimes notice a lump after an injury, but it is often unclear whether trauma caused the lipoma or simply drew attention to one that was already present.
Lipoma or another type of lump?
Several conditions can resemble a lipoma:
- Epidermoid cyst: often firmer, attached to the skin and may have a small central opening. It can become red or infected.
- Enlarged lymph node: commonly appears in the neck, armpit or groin and may be associated with infection or other illness.
- Abscess: usually painful, warm, red and may be accompanied by fever.
- Haematoma: a collection of blood after injury, surgery or blood-thinning treatment.
- Hernia: a swelling that may change with coughing, straining or position.
- Soft-tissue tumour: benign or malignant tumours can occur in fat, muscle, nerves and other tissues.
Self-diagnosis by touch alone is unreliable. A clinician considers the lump’s duration, growth, depth, consistency, mobility and relationship to the skin and muscle.
Can a lipoma become cancer?
A simple lipoma is benign and does not usually transform into cancer. Liposarcoma is a separate malignant tumour of fatty tissue rather than the usual end stage of an ordinary lipoma.
Liposarcoma is rare, but its possibility is why an atypical soft-tissue lump should be investigated before routine removal. The safest approach is neither to panic about every soft lump nor to dismiss every growing lump as “just fat.”
Warning signs that need prompt assessment
Arrange medical assessment if a lump is new, unexplained or changing. Features that increase concern include:
- Noticeable or continued increase in size
- A size greater than about 5 cm
- A deep position beneath the fascia or within muscle
- Pain that is persistent or increasing
- A firm, irregular or fixed lump
- Recurrence after previous removal
- New weakness, numbness or restricted movement
- Skin ulceration, unexplained weight loss or other systemic symptoms
None of these features proves cancer. Many large or deep fatty tumours are benign, but they should not be removed casually without appropriate imaging and planning.
How is a lipoma diagnosed?
A small, superficial, soft and stable lipoma can often be diagnosed from its history and examination. The clinician may measure it and document its location so future change can be judged accurately.
Tests may include:
- Ultrasound: useful for confirming whether a superficial lump is solid or cystic and assessing its size and depth. An unexplained lump that is increasing in size warrants urgent ultrasound assessment.
- MRI: provides detailed information about a deep, large or atypical fatty mass and its relationship to muscle, nerves and blood vessels.
- CT scan: may be used for deeper lumps in the chest, abdomen or retroperitoneum, or when MRI is unsuitable.
- Core-needle biopsy: removes small tissue samples for microscopic examination when imaging is indeterminate or suspicious.
If sarcoma is a genuine possibility, imaging and biopsy should be planned with a specialist soft-tissue tumour team. An unplanned excision can complicate later definitive treatment.
Do all lipomas need treatment?
No. A clinically typical lipoma that is small, stable and painless can be left alone after assessment. Observation avoids a scar and the small risks of surgery.
Removal may be considered when the lipoma:
- Causes pain, pressure, numbness or restricted movement
- Continues to grow
- Interferes with clothing, work, sleep or daily activity
- Is cosmetically troubling to the patient
- Has an uncertain diagnosis
- Is repeatedly traumatised because of its position
Lipoma removal surgery
Standard treatment is complete surgical excision. For a small superficial lipoma, the area is numbed with local anaesthetic, an incision is made over the lump and the fatty mass is separated from surrounding tissue. The capsule is removed where possible, bleeding is controlled and the wound is closed.
Larger, deep or anatomically complex lipomas may require regional or general anaesthesia, a longer incision and careful dissection around nerves or blood vessels. Imaging helps the surgeon plan the safest approach.
The removed tissue is usually sent for histopathology. This confirms the diagnosis and checks for unexpected atypical features.
Is there a scar?
Any surgical excision leaves a scar. The surgeon aims to place the incision along natural skin lines and keep it only as long as necessary for safe removal. Very small “keyhole” incisions are not suitable for every lipoma; forcing a large or deep mass through an inadequate opening can cause tissue injury, incomplete removal or poor control of bleeding.
Scars usually fade over time, but their final appearance depends on location, skin type, wound tension, infection and an individual tendency to form thick or keloid scars.
Recovery after lipoma excision
Most small superficial lipomas are removed as a day procedure. Mild soreness, swelling and bruising are expected for several days. The dressing should be kept clean and dry according to the surgeon’s instructions.
Return to work and exercise depends on the lipoma’s size and location and the physical demands of the job. Heavy lifting or stretching across the wound may need to be limited until healing is secure.
Seek medical advice after surgery for:
- Increasing redness, heat, swelling or pus
- Fever or worsening pain
- Bleeding that does not stop with firm pressure
- A rapidly enlarging fluid collection
- Wound separation
- New numbness, weakness or severe swelling beyond the wound
Possible complications of removal
Lipoma excision is usually straightforward, but possible complications include bleeding, haematoma, infection, fluid collection, delayed healing, an unsatisfactory scar, altered skin sensation and injury to a nearby nerve or vessel. Risks are higher for very large, deep or recurrent lipomas.
A small hollow space may remain after a large lipoma is removed. Compression, a temporary drain or follow-up aspiration may occasionally be required.
Can a lipoma return?
Recurrence after complete removal of a simple lipoma is uncommon, but it can occur if part of the lesion remains or if the original diagnosis was different. A lump that returns at the same site should be reassessed rather than repeatedly removed without investigation.
Removing one lipoma does not prevent a person who is predisposed from developing another lipoma elsewhere.
Are injections, massage or home remedies effective?
Massage, creams, herbal preparations and dietary changes do not reliably dissolve an established lipoma. Liposuction or small-incision techniques may be considered for selected lesions, but they can make complete capsule removal and full pathological assessment more difficult. The advantages and recurrence risk should be discussed with a qualified surgeon.
Do not puncture, squeeze or inject a lump at home. This can cause bleeding, infection and delayed diagnosis.
Common questions
Is a lipoma dangerous?
A typical superficial lipoma is harmless. The important step is confirming that a new or changing lump has reassuring features.
Will weight loss remove a lipoma?
Usually not. A lipoma is a discrete collection of fat cells and may remain even when overall body weight decreases.
Should every lipoma be scanned?
No. A clinician can often diagnose a small, superficial, soft and stable lipoma by examination. Growing, deep, large, firm, painful or otherwise uncertain lumps need imaging.
Can a lipoma be removed under local anaesthetic?
Many small superficial lipomas can. Large, deep or difficultly placed lesions may be safer under regional or general anaesthesia.
Key message
Most lipomas are benign, slow-growing fatty lumps and can safely be observed. A lump that is enlarging, deep, painful, firm, fixed, larger than 5 cm or recurrent deserves imaging and specialist assessment before removal. When treatment is needed, complete surgical excision usually provides an excellent result.
Consult a lipoma surgeon in Lahore
Prof. Dr. Zahid Mahmood can examine a soft-tissue lump, arrange appropriate imaging when needed and provide planned surgical removal with histopathological confirmation.
For an appointment, call 0300 413 0159 or visit professorzahid.com.
This article is for general education and does not replace personal medical assessment. Any unexplained lump that is increasing in size should be examined promptly.
Medical references
- Williams NS, O’Connell PR, McCaskie AW, editors. Bailey & Love’s Short Practice of Surgery. 28th ed. CRC Press; 2023. Chapter 42, “Musculoskeletal tumours,” soft-tissue tumour evaluation and warning signs, pp. 589–590.
- National Institute for Health and Care Excellence. Suspected cancer: recognition and referral (NG12). Section 1.11, soft-tissue sarcoma recommendations.
- NHS. Lipoma. Clinical patient information, reviewed July 2023.