Sebaceous Hyperplasia: Yellow Bumps Explained

Sebaceous hyperplasia is a benign enlargement of an oil gland, seen as a small, soft, yellowish bump with a central dimple on the forehead, cheeks or nose, usually from midlife. It is not acne and cannot be squeezed out; a physician examines it first to exclude look-alikes such as basal cell carcinoma before any in-clinic removal.

Key takeaways

Sebaceous hyperplasia is a benign enlargement of normal oil glands, seen as small, soft, yellowish bumps with a central dimple.
It appears often on the forehead, cheeks and nose, usually from midlife, and can run in families.
It is not acne or a blocked pore; there is nothing to squeeze out because the bump is gland tissue.
An early basal cell carcinoma can mimic it, so a physician examines the lesion before any in-clinic removal.
New papules can form elsewhere over the years, because the underlying tendency remains.

On this page

Key Facts
What does sebaceous hyperplasia look like?
What are these yellowish bumps, actually?
Pimple, milium, or something to biopsy?
What actually works for sebaceous hyperplasia?
What doesn't work for sebaceous hyperplasia?
Dr Sin Yong’s Viewpoint
Which type do you have?
What does not work, and why
When to see a doctor
Myths we hear in clinic
Questions Patients Actually Ask

Key Facts

What it is: Benign enlargement of normal sebaceous glands around a follicle
The signature look: 2–5 mm soft yellowish papule with a central dell (umbilication) — a tiny doughnut
Typical sites: Forehead, cheeks, nose — the highest-density sebaceous zones
Who gets it: Common from the 40s onward; earlier with strong family tendency or oily skin types
What it never does: Turn malignant — sebaceous hyperplasia is benign; but look-alikes exist, so diagnosis matters
Why squeezing fails: There is no plug to extract — the bump is gland tissue, not trapped material
Who assesses this: A physician with a dermatoscope — to exclude the basal cell mimic
Typical first step: Lesion diagnosis, then precise in-clinic removal if desired

What does sebaceous hyperplasia look like?

Sebaceous hyperplasia: soft yellowish papules of enlarged oil glands. Image: Toshitsugu Sato, Masaru Tanaka, via Wikimedia Commons (CC BY 4.0).

Multiple sebaceous papules on the face and chest. Image: Silva GPD et al., *Anais brasileiros de dermatologia* (2026), via PubMed Central (CC BY).

Dermoscopy view of a sebaceous hyperplasia papule. Image: Toshitsugu Sato, Masaru Tanaka, via Wikimedia Commons (CC BY 4.0).

What are these yellowish bumps, actually?

Each papule is a cluster of enlarged sebaceous lobules crowded around a central follicular opening — which produces the characteristic yellowish dome with a dimpled centre. With age, the hormonal signalling that regulates gland turnover shifts, and in predisposed skin some glands respond by hypertrophying [1]. They grow slowly, multiply gradually over years, and sit precisely where makeup is hardest to smooth — the forehead and mid-cheeks — which is usually why patients finally ask about them.

Pimple, milium, or something to biopsy?

Sebaceous hyperplasia never comes to a head, never resolves, and never yields anything to pressure — three ways it declares it is not acne. A milium is firm, white and keratin-filled rather than soft and yellowish. The distinction that matters medically: an early basal cell carcinoma can mimic a sebaceous hyperplasia papule, and the pearly look-alike is the reason a physician should lay eyes (and where needed a dermatoscope) on any new or changing bump before anyone burns it off [1]. Diagnosis is quick; skipping it is how the wrong lesion gets treated cosmetically.

What actually works for sebaceous hyperplasia?

Physical removal of the overgrown gland tissue. The literature supports several in-clinic modalities — electrocautery, laser ablation and other energy-based approaches — with recent work exploring focused ultrasound specifically for sebaceous hyperplasia [1]. Removal is precise, quick and done under magnification; the practical points are lesion-by-lesion treatment, the possibility of new papules forming elsewhere over the years (the tendency is yours for life), and technique that respects the surrounding skin — this sits within Dr Sin Yong's lesion-removal work alongside platforms described on the DEKA Centre of Excellence page. Oily-skin maintenance via the SkinRev programme manages the terrain, not the lesions.

What doesn't work for sebaceous hyperplasia?

Extraction — there is nothing to extract. Retinoid creams may slightly flatten early papules but do not remove established ones. Pore strips, scrubs and “deep-cleansing” facials address blockages; this is not a blockage. And home cautery pens or acid spot treatments on the face trade a benign 3 mm bump for a permanent scar — the one outcome worse than the bump.

“Sebaceous hyperplasia is not a blocked pore — it is the gland itself, enlarged. You cannot squeeze out something that is made of you.”
— Dr Sin Yong

Dr Sin Yong’s Viewpoint

These little yellow doughnuts are harmless, but I examine every one before removing any — because an early basal cell carcinoma can wear the same disguise, and burning off an undiagnosed lesion destroys the evidence. Diagnosis takes two minutes. There is no version of this where skipping it is smart.

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Sebaceous hyperplasia and look-alike bumps
Type / look-alike	How to recognise it	What it needs	What does not work
Sebaceous hyperplasia	Soft yellowish papule with a central dimple on the forehead, cheeks or nose	Examination first, then physical removal of the gland tissue if wanted	Squeezing, scrubs and pore strips
Milium	Firm, white, keratin-filled bump rather than soft and yellowish	Examination to confirm, then extraction by a clinician if wanted	Treating it as an enlarged gland
Acne pimple	Inflamed bump that comes to a head and then resolves	Acne-directed treatment after diagnosis	Gland-removal techniques such as cautery
Basal cell carcinoma look-alike	Pearly or shiny papule that is new, changing or may bleed	Dermatoscopic examination and, where needed, biopsy	Cosmetic removal without a diagnosis
Syringoma	Small, firm, skin-coloured bumps, often around the eyelids	Diagnosis, then removal options chosen after assessment	Skincare products or squeezing

Questions Patients Actually Ask

Are these bumps dangerous?+

Sebaceous hyperplasia is benign and stays benign. The caveat is the look-alike problem: early basal cell carcinoma can mimic it, so new or changing bumps deserve a physician's diagnosis first.

Why do they have a dimple in the middle?+

The enlarged gland lobules ring a central follicular opening — the dimple is that opening, and it is a useful diagnostic clue.

Can skincare shrink them?+

Topicals cannot remove established gland overgrowth. Retinoids may modestly soften early lesions; removal is physical.

Does removal leave a scar?+

Done properly, with the right energy and depth, the mark is typically minimal — far less visible than the bump. Technique and aftercare determine the result, which is why this is clinic work.

Will more appear after removal?+

Removal clears the treated lesions; the underlying tendency remains, and new papules can arise elsewhere over the years. Periodic tidy-up sessions are the honest expectation.

Are they caused by not cleansing properly?+

No. They reflect gland biology and age-related signalling, not hygiene. No cleanser prevents them.

What causes sebaceous hyperplasia?+

Sebaceous hyperplasia comes from oil glands that enlarge around a follicle. With age, the hormonal signalling that regulates gland turnover shifts, and in predisposed skin some glands respond by growing. It runs in families and is more common with oily skin. It is not caused by poor cleansing or hygiene, and no cleanser prevents it.

Can sebaceous hyperplasia be fully removed?+

Individual bumps can be treated in clinic with physical methods such as electrocautery or laser, chosen after examination. The underlying tendency remains, so new papules can appear elsewhere over the years, and occasional tidy-up visits are a realistic expectation. Technique and aftercare affect how the skin looks afterwards, and no outcome is promised.

Which treatment suits sebaceous hyperplasia?+

It depends on diagnosis first. A physician examines the bump, using a dermatoscope where needed, to exclude look-alikes such as basal cell carcinoma. If it is sebaceous hyperplasia and removal is wanted, the method is chosen by lesion size, number and site. Creams cannot remove established gland overgrowth, so removal is physical.

How much does sebaceous hyperplasia treatment cost in Singapore?+

The cost follows the plan. It depends on the number and size of the bumps, the area treated, the device and consumables used, whether removal is done in one visit or staged and whether other lesions are treated at the same time. A written quote is given at consultation after examination, and the consultation decides whether removal is advised.

Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 7 September 2026 · Editorial policy

Sebaceous Hyperplasia

Key Facts

What does sebaceous hyperplasia look like?

What are these yellowish bumps, actually?

Pimple, milium, or something to biopsy?

What actually works for sebaceous hyperplasia?

What doesn't work for sebaceous hyperplasia?

Dr Sin Yong’s Viewpoint

Prefer Not to Use WhatsApp?

Which type do you have?

What does not work, and why

When to see a doctor

Myths we hear in clinic

Questions Patients Actually Ask

References