Key takeaways
- A soft yellow bump with a central dip is usually an enlarged oil gland, not a clogged pore you can squeeze out.
- Get it checked if: it bleeds, crusts and reopens, looks shiny or pearly with red vessels running across it, or slowly grows without any yellow tint.
- Removal numbers: In one series, freezing took 6 sessions 2 weeks apart; in another, single-needle radiofrequency took about 2 sessions on average.
- Treated bumps rarely came back within 4 to 6 months, but untreated glands nearby can still enlarge and show up as new bumps.
If it's yellowish, under 3 mm, and has a small dip in the center, it most likely matches sebaceous hyperplasia: an oil gland that has grown larger than usual. It's harmless, and squeezing won't empty it the way it would a whitehead. A dip in the center can also show up in basal cell carcinoma, though, so a bump that bleeds or keeps crusting over deserves a closer look.
What Are These Yellow Bumps With a Dip in the Middle?
What Are These Yellow Bumps With a Dip in the Middle?
Each one is a single oil gland (sebaceous gland) that's gotten bigger. The gland's yellow lobules sit in a ring around one hair follicle opening, so from the surface you see a tiny yellow dome with a pinpoint dip in the middle. Because there's no trapped plug inside, pressing on it doesn't make it smaller.
They tend to appear on the forehead, cheeks, and sides of the nose from middle age on, and they're more common in men. Oil glands respond to androgens (male-pattern hormones), so their activity shifts with age and hormone levels. People who take long-term immune-suppressing medicine, for example after an organ transplant, also get them more often.
What Are These Yellow Bumps With a Dip in the Middle?
How Is It Different From Milia, Acne, or Skin Cancer?
How Is It Different From Milia, Acne, or Skin Cancer?
Color, texture, and whether it has ever bled are the first things to sort out. Milia are tiny pearly-white cysts filled with keratin (a skin protein). Acne flares up red and tender, then settles. Sebaceous hyperplasia keeps its yellow tint and doesn't go away on its own; people in one treatment series had lived with theirs for about 4 years on average.
| Look-alike | Color and shape | Over time |
|---|---|---|
| Sebaceous hyperplasia | Yellow lobules, central dip, up to 3 mm | Stays about the same |
| Milia | Pearly-white, firm, no dip | Can last weeks to months |
| Acne | Red, swollen, tender | Comes and goes |
| Basal cell carcinoma | Shiny or pearly bump, may have a dip or sore, vessels across the surface | Grows slowly, may bleed and crust repeatedly |
At a clinic, a doctor can look with a dermatoscope, a lighted magnifier that shows vessel patterns. In a study of 30 lesions, 86.6% showed thin "crown" vessels curving around the yellow lobules. Basal cell carcinoma tends to show tree-like branching vessels instead, and when the picture still isn't clear, a small biopsy confirms it.
Don't write a bump off as sebaceous hyperplasia if you notice any of these:
- It bleeds on its own or every time you wash or shave over it
- It crusts, heals, and then opens up again
- The surface looks shiny or pearly with red vessels running across it
- It's skin-colored or pink with no yellow tint and slowly getting bigger
On the other hand, if it's yellow, 3 mm or smaller, and has never bled or crusted, it isn't urgent. It's still worth having a new bump checked once under magnification before anything is removed.
What Do Removal Studies Show?
What Do Removal Studies Show?
Sebaceous hyperplasia doesn't need treatment. People usually have it removed because they don't like the look, or because it keeps getting irritated. Options include freezing (cryotherapy), light electrocautery with a fine needle, lasers, and single-needle radiofrequency. Photodynamic therapy (a light-sensitizing cream activated by light) and acid applied to the bump are also described, though the studies used here don't give numbers you can compare side by side for those.
The number of sessions differs a lot by method. A Turkish series treated 517 bumps in 40 people with liquid nitrogen, 6 times at 2-week intervals. Afterward, 65.9% of the bumps had shrunk by 76% or more.
What Do Removal Studies Show?
At a hospital in China, 45 people treated with single-needle radiofrequency needed 2.2 sessions on average, and 44 of them saw their bumps shrink by more than 90%. Men needed more sessions than women. Neither study had a comparison group, so they can't tell you which method is better. Results also vary from person to person.
Why Do New Bumps Show Up After Removal?
Why Do New Bumps Show Up After Removal?
It helps to separate two things: a treated bump growing back, and a different gland nearby getting bigger. For treated bumps, the freezing series saw no regrowth over 4 months, and the radiofrequency group had 1 regrowth out of 45 people over 6 months. Neither one tells you what happens years later.
New bumps are a separate story. Your untreated oil glands keep responding to age and hormones, so one of them can enlarge later and look like a "new" bump. Isotretinoin, an oral vitamin A medicine used when bumps are widespread, can clear them, but they may return after you stop. A realistic plan is to clear the ones you have now and deal with new ones while they're still small.
What's Normal After Removal, and When Should You Call?
What's Normal After Removal, and When Should You Call?
Redness and small crusts are expected. In the radiofrequency group, all 45 people had redness and 8.9% had crusting. In a 4-person report using a 1,720 nm laser, the crusts cleared within 10 days. Never pick at scabs; let them fall off on their own.
Marks are uncommon but possible. Out of 517 frozen bumps, 5 (0.96%) developed temporary darkening. An Iranian trial compared electrocautery and freezing across four kinds of benign bumps: lighter patches showed up in 6.3% and small pitted scars in 3.1% of electrocautery cases. On the freezing side, 3.1% lightened and 6.3% lost color.
Contact the clinic that treated you if you notice:
- Redness and pain that keep spreading instead of fading
- Oozing or pus under the crust
- A white patch or a pitted mark after the crust falls off
- The treated spot opening up and bleeding again
When you reach out, include the treatment date and photos taken from the same distance so changes are easy to compare.
What Should You Bring to a Consultation?
The first question to ask is: "Under magnification, does this look like sebaceous hyperplasia?" Removal options and session counts only make sense once that's settled. If you have many bumps, it's also worth asking whether they'd be treated a few at a time or in one visit, since that changes how many days of redness and crusting you'd plan around.
STON Clinic is in Seoul. If you'd like it to take a look, send close-up photos of the bumps, when they first appeared and whether they're growing, and whether any have ever bled or crusted. Mention it if you're taking isotretinoin or immune-suppressing medicine. After treatment, retaking photos in the same light around 4 months later makes it easier to tell a new bump from one that's come back.
If this raised a question about your own skin
Ask a questionReferences
- What sebaceous hyperplasia looks like and how it's treated — DermNet — DermNet NZ
- Who gets sebaceous hyperplasia, look-alikes, and treatment options — StatPearls, 2023 — PubMed Central
- Signs and symptoms of basal cell carcinoma — American Academy of Dermatology — American Academy of Dermatology
- Freezing treatment for facial sebaceous hyperplasia in 40 people — J Cutan Med Surg, 2017 — PubMed Central
- Single-needle radiofrequency for facial sebaceous hyperplasia in 45 people — J Cosmet Dermatol, 2025 — PubMed Central
- Freezing vs. electrocautery for four benign skin bumps — Health Sci Rep, 2024 — PubMed Central
- Dermatoscope features of 30 sebaceous hyperplasia lesions — J Eur Acad Dermatol Venereol, 2008 — PubMed Central
- 1,720 nm laser for sebaceous hyperplasia in 4 people — J Drugs Dermatol, 2012 — PubMed Central
- Sebaceous hyperplasia and skin cancer in 117 kidney transplant patients — J Am Acad Dermatol, 2006 — PubMed Central
- How isotretinoin works and why it's avoided in pregnancy — DermNet — DermNet NZ
Frequently asked questions
Q. My baby has tiny yellow dots on the nose. Is it the same thing?
A. It's the same condition, but in newborns it's temporary. A study of 1,000 newborns in Iran found it in 43.7%, caused by exposure to the mother's hormones, and it fades on its own. It's uncommon in children and teens.
Q. Can pills get rid of sebaceous hyperplasia?
A. Oral isotretinoin can clear widespread bumps, but they may return after you stop taking it. It must not be taken during pregnancy. For women, anti-androgen medicine can sometimes help.
Q. Is electrocautery or freezing better for sebaceous hyperplasia?
A. In a small Iranian trial, patients and doctors were more satisfied with electrocautery than with freezing for sebaceous hyperplasia over 3 months. Freezing did better for seborrheic keratosis in the same trial. Bump size and number still shape which option makes sense for you.
Q. I take anti-rejection medicine after a transplant and have many yellow bumps. Should I worry?
A. These bumps are more common with long-term immune suppression, reported in 10 to 16% of people on long-term cyclosporine. In a study of 117 kidney transplant patients, 45.7% of those with sebaceous hyperplasia had a history of skin cancer. Regular skin checks are a good idea after a transplant.
Q. Are men more likely to get it?
A. Yes. It's more common in men from middle age on, because oil glands respond to androgens. In the radiofrequency study, men also needed more sessions than women.
Q. Does removal hurt?
A. In the 45-person radiofrequency study, the average pain score was 2.6 out of 10. Pain scores for other methods weren't available in the sources used here, so ask what numbing is used at your consultation. Plan your schedule around a few days of redness and crusting.
Treatment guide for this topic
Jangju Kim Senior Director
JANGJU KIM
Dr. Jangju Kim is a clinic director at STON Clinic, LOTTE HOTEL in Myeongdong.
Career / Education
- 현) 스톤클리닉 명동 롯데호텔 원장
- 경희대학교 의과대학 졸업
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