Key takeaways
- Texture sorts these three faster than the press test does. Petechiae are flat, a cherry angioma is a smooth bead, keratosis pilaris is a rough field of tiny bumps.
- Petechiae are pinpoint bleeding under the skin, usually 1 to 2 mm, arriving in a scatter over hours and fading within about two weeks.
- A cherry angioma is a benign vascular growth, roughly 1 to 5 mm, that has sat in the same spot for months or years and does not fade.
- Keratosis pilaris plugs many hair follicles at once, so you feel sandpaper across a whole patch, most often the backs of the upper arms.
- A fresh scatter of flat red pinpoints alongside fever, easy bruising, or feeling unwell is the one pattern that gets seen today.
The press test is not the answer you were promised. Most guides tell you to roll a glass over the mark. Petechiae stay red, a cherry angioma fades. It is a real signal. It is also the weakest of the three you have. An established angioma can refuse to blanch. And the pink skin around keratosis pilaris fades under pressure while the bump stays put.
Texture and speed sort petechiae vs cherry angioma vs keratosis pilaris in about five seconds, before you press anything. Run a fingertip across the area with your eyes closed. Rough field, flat nothing, or one smooth bead standing slightly proud. That single pass tells you more than the glass does. The rest of this page shows you what to do with the answer. It also names the one pattern that skips the guesswork.
Run a fingertip first, then look
Touch decides this faster than color does. All three look red in a photograph. Your camera flattens texture, your fingertip does not. That is why two people can post the same picture and get three different answers.
Keratosis pilaris feels like fine sandpaper spread over a broad area. Each bump is 1 to 2 mm. Each one sits on a hair follicle. Petechiae feel like nothing at all, because the blood causing the color is underneath an intact surface. A cherry angioma is the odd one out. It is a single smooth bead you can feel the edge of, with normal skin all around it.
What each one actually is
Three different biologies produce three red marks that look alike on a phone. Knowing what happens underneath is what makes the visual clues stop feeling random.
Cherry angioma
A cherry angioma is a small, harmless cluster of widened capillaries. It grows just under the surface, which is why the color is so deep. Most measure 1 to 5 mm, run bright cherry red to deep purple, and feel smooth. They become common from the 30s onward and are one of the most frequently seen benign skin growths in adults. Once one arrives it stays: these do not resolve on their own.
Petechiae
Petechiae are pinpoint bleeds, where tiny vessels have leaked into the skin. Each mark is 1 to 2 mm, and always under 3 mm. That 3 mm line is how doctors separate petechiae from the larger patches called purpura. They are flat. They arrive in clusters or a fine scatter, never one at a time. The color shifts from red toward purple or brown as the blood breaks down.
Keratosis pilaris
Keratosis pilaris starts with keratin, the protein that makes up the surface of skin. It plugs the opening of many hair follicles at once. Each plug forms a 1 to 2 mm bump, and the redness is the irritation around it rather than the bump itself. Think of a drain screen catching debris across a whole surface instead of at one point. The color varies by skin tone: pink or red on lighter skin, brown or grey on deeper skin.
Why each one shows up
Cause is the clue most comparison pages skip. It is often the one that settles the question. Cherry angiomas track with age and genetics. Hormonal shifts such as pregnancy or hormone therapy are reported as a trigger for new ones. If you are in your 40s and a smooth red dot appeared quietly on your chest, that history fits.
Petechiae come from either pressure or a blood-side cause. Hard coughing, vomiting, straining, childbirth and heavy lifting can burst surface capillaries. Around the face, neck and chest, that kind is harmless. The other kind comes from infection, a low platelet count, or certain medicines. Blood thinners and some antibiotics are on that list. Keratosis pilaris runs in families and worsens with dry skin and cold weather. It is not caused by anything you did.
How fast it appeared, and how long it stays
How fast it arrived is the second-strongest clue after texture. It costs nothing to check. Petechiae are the fast one. A crop appears that was not there yesterday, often dozens at once. It clears again within about two weeks.
A cherry angioma is the slow one. It appears quietly, often noticed weeks later. Then it holds its size and place for years. Keratosis pilaris is the cyclical one: rough all winter, calmer in summer. It stays for years and often eases after the 30s. If you can date the mark to a specific day, you are probably not looking at an angioma.
The press test, and what it can honestly tell you
Done properly, the press test describes a mark rather than naming it. Press a clear drinking glass firmly against the skin for about 10 seconds. Watch the mark through the glass while the pressure is on. Do not judge it after you lift.
Petechiae generally stay visible, because the blood has already left the vessels and pressure cannot move it. A cherry angioma often pales at least partly. You are squeezing blood out of vessels that are still intact. A long-standing one that has gone fibrous may barely change. Keratosis pilaris gives the most misleading result of the three: the surrounding pinkness fades convincingly while the plug you can feel is untouched. Two of the three can blanch. One of them often will not. That is why this test belongs third in your sequence, not first. Our full blanch-test method walks through the technique in detail.
At-a-glance comparison
The strongest read comes from several clues pointing the same way, not from any single one. Use this to line up what you observed, then let onset speed, symptoms and your own uncertainty decide whether this needs a professional.
| Clue | Cherry angioma | Petechiae | Keratosis pilaris |
|---|---|---|---|
| Feel | Smooth dome or flat-topped bead | Flat, you feel nothing | Rough, like fine sandpaper |
| Size | 1 to 5 mm | 1 to 2 mm, always under 3 mm | 1 to 2 mm per bump |
| Pattern | Separate dots with clear skin between | Cluster or fine scatter | Broad symmetrical patch |
| Usual sites | Chest, trunk, upper arms | Anywhere, often legs, face, neck | Backs of upper arms, thighs, cheeks |
| Onset | Quiet, noticed weeks later | Sudden, often within hours | Gradual, worse in winter |
| How long it lasts | Years, does not fade | Days to about two weeks | Years, waxes and wanes |
| Under the glass | Often pales, not always | Usually stays red | Redness fades, bump remains |
| Cosmetic removal | An option once identified | Never, treat the cause | No, it is a whole field |
Three answers, three different next steps
Only one of these three belongs in a removal conversation. Mixing them up costs you time or skin. Keratosis pilaris is managed as a field, not as spots. Gentle moisturising softens the plugs, and so does a keratolytic such as urea or lactic acid. No point-by-point tool suits a patch holding dozens of follicles.
Petechiae are a signal, not a blemish. The right response is to work out why the capillaries leaked. Removing the marks would erase a clue a doctor may need. A cherry angioma is the only one of the three that is a single, stable, harmless growth. So it is the only one that can enter a cosmetic removal pathway, once it has been identified.
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When to have it looked at, and when to go today
One pattern here is urgent. The rest are not. Watch for a fresh, widespread scatter of flat red pinpoints. If it arrives with fever, easy bruising, bleeding gums, or feeling very unwell, that is an emergency assessment, not a skincare question. The combination can point to a low platelet count or a serious infection. Go, even if you feel foolish afterwards.
A rough patch that has sat on the backs of your arms since your teens is the opposite end of the scale. Everything else sits between those two. The honest rule: any mark you cannot confidently place gets a professional eye, not a fingertip. Photograph the spot with something for scale. Note the date you first saw it, and take both with you.
A quick check before you start
Nearly all of these spots are harmless, and a few seconds is all it takes to be sure yours is the routine kind. Treat it at home if it is stable and unchanged. It is worth a quick word with a professional first if:
- It is growing or changing in size, shape, or color.
- It bleeds on its own, or it is painful.
- It has an irregular border, or it does not fit the routine pattern.
- The red pinpoints are new, spreading, or came with fever or bruising.
- It is a mole or any pigmented or changing lesion of any kind. A mole can be or become melanoma, a dangerous one cannot be told from a harmless one by sight, and any mole should be examined in person by a dermatologist before at-home removal is ever considered.
- You are simply not sure what it is.
What precision removal actually involves
Once a cherry angioma has been identified, removal is a job of millimetres. A plasma pen holds a fine tip just above the surface. A controlled arc crosses the tiny air gap. Nothing is cut and nothing is frozen. Picture a jeweller working with tweezers rather than a hammer: the tool is chosen for how small the target is.
Control is what matters on a 2 mm dot on thin chest skin. Nine adjustable power settings exist for that reason. A delicate spot should not get the same energy as a thick, tough one. That gap is the difference between a clean result and a mark that outstays the dot. A small protective crust forms. It lifts on its own between Day 3 and Day 7. The skin settles by Week 2 to 3. Leave the crust alone, keep it out of the sun, and let it do its job.
"I've had that exact red dot on my collarbone for YEARS and just accepted it. not anymore"Facebook comment, April 2026
That reaction is the common one. It is why identification comes first on this page, not last. The dot she had accepted for years was a cherry angioma all along. That is the only one of the three conditions here where the story ends well.
FAQ
Frequently asked questions
These are the questions people ask once they have run a fingertip over the spot and still want a second opinion.
Quick answers before you decide
↓ Tap each question to reveal the answer.
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The bottom line
Feel the area first, date the mark second, and press the glass third. A rough field is keratosis pilaris, and it is treated as skin care. A sudden flat scatter is petechiae, and the cause gets treated, not the marks. A single smooth bead that has not moved in years is almost always a cherry angioma. Only the last of those is a cosmetic decision, and only after someone qualified agrees with you.
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See the productThe OcuraLife Plasma Pen is a cosmetic device for benign, surface-level spots and is not a substitute for medical advice or diagnosis. If a spot is changing or you are unsure, check with a qualified professional.
