How to Tell If a Lump Under Your Skin Is a Lipoma

Finding a lump under your skin can be alarming. Many people immediately worry about serious conditions, but in many cases, these lumps are benign (non-cancerous). One of the most common causes is a lipoma—a harmless growth made up of fat cells.

Understanding how to recognize a lipoma and when to seek medical evaluation can help you feel more confident and proactive about your health.

What Is a Lipoma?

A lipoma is a soft, slow-growing lump made of fatty tissue that develops just beneath the skin. These growths are typically non-cancerous and rarely turn into something more serious.

Lipomas can appear anywhere on the body but are most commonly found on the:

• Neck
• Shoulders
• Back
• Arms
• Thighs

They can occur at any age but are most often seen in adults between 40 and 60.

Common Characteristics of a Lipoma

Soft and Doughy Texture

Lipomas usually feel soft to the touch, almost like a small rubbery or doughy mass under the skin.

Easily Movable

When you press on a lipoma, it often moves slightly beneath the skin rather than staying fixed in place.

Slow Growth

These lumps tend to grow very slowly over months or even years.

Painless

Most lipomas do not cause pain. However, they may become uncomfortable if they press on nearby nerves or tissues.

Small to Moderate Size

Lipomas are typically small—often less than 2 inches in diameter—but some can grow larger over time.

When a Lump Might Not Be a Lipoma

While many soft tissue lumps are lipomas, not all are harmless. It’s important to recognize signs that may indicate a different condition:

• The lump is hard or firm
• It doesn’t move when touched
• It is growing rapidly
• You experience pain or tenderness
• The lump is deep beneath the skin
• There are changes in the skin over the lump (redness, ulceration)

How Lipomas Are Diagnosed

In many cases, an experienced physician can diagnose a lipoma with a simple physical exam. However, additional testing may be recommended if there is any uncertainty, including:

• Ultrasound to evaluate the structure of the lump
• MRI or CT scan for deeper or unusual growths
• Biopsy to rule out more serious conditions

These steps help ensure an accurate diagnosis and appropriate treatment plan.

Do Lipomas Need Treatment?

Most lipomas do not require treatment and can safely be left alone if they are:

• Small
• Painless
• Not growing

However, removal may be recommended if the lipoma:

• Causes discomfort or pain
• Restricts movement
• Becomes cosmetically bothersome
• Continues to grow

Treatment Options

The most common treatment is surgical removal, which is typically a straightforward outpatient procedure.

When Should You See a Doctor?

It’s always a good idea to have any new lump evaluated, especially if:

• You’re unsure what it is
• It changes in size, shape, or feel
• It becomes painful
• You notice multiple lumps developing

Final Thoughts

Discovering a lump under your skin can be concerning, but many of these growths—like lipomas—are harmless and easily managed. Paying attention to key characteristics such as texture, movement, and growth rate can help you better understand what you’re dealing with.

If you’re ever in doubt, a medical evaluation is the best way to get clarity and reassurance.

Dr. Glenn Sandler and his team are committed to helping patients identify and treat a wide range of conditions with personalized, expert care.