Is That Lump Permanent? Why Your Skin Grows a Lipoma and What to Do Next

Finding a soft lump under your skin can be unsettling. One of the most common causes is a lipoma — a benign (non-cancerous) growth made up of fat cells.

If you're wondering whether a lipoma is permanent, why it formed, and what your medically approved next steps should be, here's what you need to know.

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What Is a Lipoma?

A lipoma is a slow-growing, soft lump made of fat tissue. It usually sits just under the skin and feels:

• Soft or doughy
• Movable when you press it
• Painless (in most cases)
• Slow to grow

Lipomas are very common. They can appear almost anywhere on the body but are most often found on the:

• Neck
• Shoulders
• Back
• Arms
• Thighs

They can occur at any age but are most common in adults between 40 and 60 years old.

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Is a Lipoma Permanent?

In most cases, yes — a lipoma does not go away on its own.

Once formed, a lipoma typically:

• Stays the same size
• Grows slowly over time
• Remains stable for years

Lipomas do not usually shrink without treatment. The only way to completely remove a lipoma is through a medical procedure, typically minor surgery.

That said, many lipomas are harmless and do not require removal unless they:

• Become painful
• Grow rapidly
• Press on nerves
• Limit movement
• Cause cosmetic concern

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Why Does the Skin Grow a Lipoma?

Doctors don't know the exact cause of every lipoma, but research points to several contributing factors.

1. Genetics

The strongest known risk factor is family history. Lipomas tend to run in families. If one of your parents has had a lipoma, your risk increases.

Some inherited conditions linked to multiple lipomas include:

• Familial multiple lipomatosis
• Gardner syndrome
• Madelung disease

These conditions are uncommon but medically recognized.

2. Minor Injury (Sometimes)

In some cases, a lipoma appears in an area that previously had a minor injury. However, trauma is not considered a direct cause — it may simply draw attention to an already forming lump.

3. Age

Lipomas are most common in middle adulthood. They are rare in children.

4. Body Weight

Lipomas are made of fat cells, but they are not caused by obesity. Losing weight does not make a lipoma disappear, and gaining weight does not necessarily cause one to form.

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How Do You Know It's a Lipoma?

A typical lipoma has recognizable features:

• Soft and rubbery
• Easily movable under the skin
• Usually smaller than 2 inches (5 cm), though some grow larger
• Painless

However, not every lump is a lipoma. Some lumps require urgent evaluation.

Warning Signs That Need Medical Attention

Speak to a doctor promptly if a lump is:

• Hard or firm
• Fixed in place (not movable)
• Rapidly growing
• Painful without pressure
• Deeper in the tissue
• Larger than 2 inches and expanding
• Associated with unexplained weight loss

Rarely, a cancer called liposarcoma can resemble a lipoma. Liposarcoma is uncommon but serious. The key difference is that liposarcomas tend to grow more quickly, feel firmer, and may cause pain.

If you're unsure what you're feeling, start with a free Lipoma symptom checker to help determine whether your symptoms warrant immediate medical attention.

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How Is a Lipoma Diagnosed?

Doctors usually diagnose a lipoma with a:

• Physical exam

If there is any uncertainty, they may order:

• Ultrasound
• MRI scan
• CT scan
• Biopsy (rare, but used if cancer is suspected)

Imaging is more likely if the lump is:

• Deep
• Large
• Painful
• Growing quickly

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Medically Approved Treatment Options

1. Watchful Waiting

If the lipoma is:

• Small
• Painless
• Not growing

Your doctor may recommend simply monitoring it.

This is a safe and common approach.

2. Surgical Removal

The most effective treatment is minor surgical excision.

• Done under local anesthesia
• Usually completed in under an hour
• Low complication risk
• Permanent removal

Once removed, a lipoma rarely comes back in the same spot.

3. Liposuction

In some cases, liposuction may be used to remove fatty tissue. However:

• It may not remove the entire capsule
• Recurrence is slightly more likely

Surgical excision remains the gold standard.

4. Steroid Injections (Less Common)

In rare cases, a corticosteroid injection may shrink a lipoma but usually does not eliminate it completely.

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Can a Lipoma Turn Into Cancer?

A true lipoma does not turn into cancer.

However, misdiagnosis can happen. What appears to be a lipoma may rarely be a different type of tumor.

This is why medical evaluation is important if:

• The lump changes
• Symptoms develop
• You feel uncertain

Early evaluation prevents delayed diagnosis of more serious conditions.

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Should You Remove a Lipoma?

Removal is a personal decision unless medical symptoms are present.

You may consider removal if:

• It causes discomfort
• It affects your movement
• It creates emotional distress
• It grows noticeably

You may choose observation if:

• It is stable
• It is painless
• It does not bother you

There is no medical requirement to remove a harmless lipoma.

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What Happens If You Leave It Alone?

Most lipomas:

• Stay benign
• Grow very slowly
• Cause no complications

However, very large lipomas can:

• Press on nearby nerves
• Cause discomfort
• Limit mobility

In those cases, removal becomes medically reasonable.

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When to Speak to a Doctor

Always speak to a doctor if:

• You are unsure whether it's a lipoma
• The lump grows quickly
• It becomes painful
• It feels firm or fixed
• You develop new symptoms

Any lump that behaves differently from a typical soft, slow-growing lipoma deserves evaluation.

If you suspect something more serious — especially rapid growth, deep tissue involvement, or systemic symptoms like unexplained weight loss — seek medical care promptly.

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The Bottom Line

A lipoma is one of the most common and least dangerous causes of a lump under the skin. In most cases:

• It is permanent unless removed
• It does not turn into cancer
• It grows slowly
• It does not require treatment

The main cause is genetics, and it is not something you caused by diet, weight, or lifestyle.

Still, every new or changing lump deserves proper evaluation. If you notice a suspicious lump and want guidance before your appointment, try this free Lipoma symptom checker to better understand what questions to ask your doctor.

And most importantly, speak to a doctor about any lump that is painful, growing quickly, firm, deep, or otherwise concerning. While lipomas are usually harmless, your health and peace of mind are worth a professional evaluation.