I’m Dr. Tina Jenq from Oregon Cosmetic and Reconstructive Clinic. Many patients come to me with a small bump or lump beneath the skin and ask, “What is this—and do I need to worry?” That is a great question.
Most of these growths are harmless. However, moles, lipomas, and
sebaceous cysts can sometimes look or feel similar. Understanding their
common differences can help you know what may be happening beneath your
skin and what kind of treatment may make sense.
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Comparing Moles, Lipomas, and Sebaceous Cysts
These common skin growths can look or feel similar. The features below
provide a general comparison, but an in-person examination is the most
reliable way to identify an unfamiliar lump or growth.
| Feature | Mole | Lipoma | Sebaceous Cyst |
|---|---|---|---|
| Typical Feel | Usually firm. A mole may be flat, slightly raised, or dome-shaped. |
Usually soft or rubbery and often moves beneath the skin. | Usually firmer and more closely attached to the skin. It may have a visible central opening. |
| Location | On the surface or within the upper layers of the skin. | Within the fatty tissue beneath the skin. Some lipomas extend more deeply. |
Within the skin or immediately beneath it. |
| Growth Pattern | Often remains stable or changes gradually over time. | Usually grows slowly over several months or years. | May remain stable but can enlarge quickly when inflamed. |
| Pain or Irritation | Usually painless unless it is repeatedly rubbed or irritated. | Usually painless, although a larger lipoma may create pressure. | May become tender, red, swollen, or painful when inflamed. |
| Common Treatment | Observation, shave removal, or surgical excision, depending on the mole and the treatment goal. |
Observation or surgical removal when it grows, causes pressure, creates discomfort, or becomes a cosmetic concern. |
Surgical removal of the cyst wall and surface opening to reduce the chance of recurrence. |
Moles: Small Clusters of Skin Cells
A mole forms when pigment-producing skin cells grow
together instead of spreading evenly throughout the skin. Moles usually
sit on the surface or within the upper layers of the skin.
Moles may be:
- Round or oval
- Light brown, dark brown, pink, or skin-colored
- Flat, slightly raised, or dome-shaped
Over time, a flat mole may become more raised. Most moles are benign.
However, it is important to have a mole checked if you notice changes in
its color, border, shape, size, or surface.
A mole that begins bleeding without a clear injury, develops an irregular
border, or changes rapidly should also be evaluated.
Lipomas: Soft Lumps Beneath the Skin
A lipoma is a benign growth made from fat cells. Unlike a
mole, a lipoma grows beneath the skin, usually within the fatty layer.
Some lipomas can also develop beneath a muscle.
Lipomas usually feel:
- Soft or rubbery
- Movable when gently pressed
- Slow-growing
- Painless, although larger lipomas may cause pressure or discomfort
Small, superficial lipomas can often be removed in the clinic, depending
on their size and location. A deeper lipoma beneath a muscle may require a
more involved procedure.
In those cases, I make a careful incision, remove the growth, and repair
the deeper tissue or muscle layer. Recovery is usually straightforward,
and many patients return to most normal daily activities within a few
days.
Sebaceous Cysts: Clogged Follicles Beneath the Skin
A sebaceous cyst forms when a follicle or skin structure
becomes blocked. As material builds up, it creates a smooth, rounded lump
beneath the skin.
A cyst may have a small central opening called a punctum.
Although the opening appears on the skin, the cyst wall extends more
deeply. To reduce the chance that the cyst returns, removal usually
includes both the surface opening and the complete cyst wall beneath the
skin.
These minor procedures can often be performed in the clinic with local
anesthesia. Patients usually experience mild aching for a day or two,
which they can often manage with Tylenol.
Depending on the size and location of the cyst, many patients can resume
cardio exercise after about three days. I provide more specific activity
instructions after the procedure.
When Should You Have a Skin Lump Evaluated?
It is worth having a lump examined if you notice:
- Rapid growth
- Increasing pain or tenderness
- Redness, warmth, or drainage
- A change in color, shape, or surface
- A lump that feels fixed rather than movable
- A growth that catches on clothing or interferes with activity
- A cosmetic concern that makes you feel self-conscious
When to See a Specialist
At Oregon Cosmetic and Reconstructive Clinic, I perform detailed
assessments to determine what type of growth you may have and whether
observation, imaging, biopsy, or removal makes sense.
Although many moles, lipomas, and cysts are benign, an examination provides
more reliable information than appearance or texture alone.
Understanding what is beneath your skin can help you make a confident,
informed decision about your care.
Have a Mole, Cyst, or Lump You Would Like Evaluated?
Skip the phone tag. Text our team to schedule a skin consultation with
Dr. Tina Jenq at our Happy Valley clinic.
Serving Portland, Clackamas, Lake Oswego, and nearby communities.
Frequently Asked Questions
How can I tell the difference between a lipoma and a sebaceous cyst?
A lipoma usually feels soft or rubbery and often moves beneath the
skin. A sebaceous cyst is often firmer and more closely attached to the
skin. A cyst may also have a small central opening, while a lipoma does
not. An examination is the best way to confirm the difference.
Can a cyst develop beneath a mole?
Yes. A mole may sit on the surface while a cyst forms in a follicle
beneath it. This can make the mole appear more raised or create a firm
lump underneath. A new or changing lump should be examined to confirm
the cause.
Is a fatty tumor the same as a lipoma?
Yes. “Fatty tumor” is a common term for a lipoma. Lipomas are generally
benign and slow-growing. Some patients choose removal because a lipoma
causes pressure, catches on clothing, becomes noticeable, or creates a
cosmetic concern.
Can moles, lipomas, and cysts be removed in the office?
Many smaller and more superficial growths can be removed in the clinic
with local anesthesia. Larger or deeper growths may require a more
involved procedure. I determine the best setting after examining the
size, depth, and location.
When should I see a surgeon in Portland for a skin lump?
Arrange an evaluation if a lump grows rapidly, becomes painful or red,
changes in appearance, feels unusually firm, or is difficult to
identify. You may also request removal when a benign growth causes
physical discomfort or a cosmetic concern.
