Three different conditions. All small and red. Only one is benign and treatable at home. This page gives you the side-by-side comparison, the one physical test that separates them in seconds, and clear routing on what to do with each one.
For the full picture on cherry angiomas specifically, see the complete cherry angioma guide. This page is the identification question.
Key takeaways
The blanching test, the shape, and the onset pattern route you correctly.
- Cherry angioma: small raised dome, 1 to 5 mm, cherry red to dark purple, blanches under pressure.
- Hemangioma: vascular growth that also blanches, but deeper, often spongy, most common in infants.
- Petechiae: flat pinpoint red marks, do NOT blanch under pressure, caused by broken capillaries.
- The glass-press test takes 30 seconds. If the mark does not blanch, see a doctor today.
- Only confirmed cherry angiomas in clearly visible locations have an at-home treatment pathway.
What each condition actually is
Cherry angiomas, hemangiomas, and petechiae all appear as red marks on the skin, but they come from three completely different biological events.
Cherry angiomas are clusters of dilated blood vessels that have expanded outward and formed a tiny raised dome just under the surface of the skin. They are benign, do not bleed on their own, and are extremely common in adults over 30. They are a structural change to the vessel, not a sign of disease.
Hemangiomas are also vascular, meaning they involve blood vessel overgrowth, but the underlying biology is different. Most people associate hemangiomas with infants (strawberry hemangiomas are a common childhood condition that typically fade without treatment). Adult hemangiomas do exist, particularly cavernous hemangiomas, which are deeper and can involve larger clusters of vessels. They are almost always benign, but larger or deeper ones may warrant a dermatologist evaluation.
Petechiae are not a vascular growth at all. They are tiny hemorrhages: broken capillaries that have leaked a small amount of blood under the skin. The blood is trapped under the surface with no growth or vessel dilation. Petechiae are flat, pinpoint-sized, and do not change with pressure. They are often a sign of something happening systemically, not just a local skin condition, and that is why they matter differently from the other two.
Side by side: the comparison table
Read this once, then we will walk through the key differences. The cherry angioma column is highlighted because the rest of this cluster goes deeper into that condition. The petechiae column is red-coded because it is the one condition on this page that is never a candidate for at-home treatment and may require urgent care.
The cherry angioma column is the only column on this page where an at-home plasma pen device is appropriate. Both other columns route elsewhere.
The blanching test: the fastest way to tell them apart
Press a glass firmly against the red mark. Or use a fingertip and press hard enough to blanch the surrounding skin. This is the first thing a dermatologist would do in the exam room, and it is completely safe to do yourself. It takes under 30 seconds.
What each result means
The mark lightens or disappears under pressure. It is vascular. Blood is being squeezed out of the vessel temporarily. This rules out petechiae and keeps cherry angioma and hemangioma as candidates. You can now move to the next layer of differentiation.
The mark stays exactly the same color under pressure. It is likely petechiae. The blood is outside the vessel, under the skin, and pressure cannot move it. This is the moment to stop the identification process and see a doctor. Do not attempt at-home treatment.
Why this test matters here
Cherry angiomas and hemangiomas both have blood inside dilated vessels. When you apply pressure, that blood temporarily leaves the compressed area, making the mark fade. Petechiae are different: the blood has already escaped its vessel and pooled under the skin surface. It has nowhere to go when you press. That is the biology that makes the blanching test reliable, and it is the single most useful piece of information on this page.
How to tell cherry angiomas from hemangiomas
Both cherry angiomas and hemangiomas blanch under pressure, so you need the next layer of differentiation. According to the American Academy of Dermatology, hemangiomas are among the most common vascular lesions, but the clinical picture differs meaningfully from cherry angiomas in adults.
Age of onset
Age of onset is the fast filter. Cherry angiomas almost always appear in adults over 30, with prevalence increasing steadily through middle age. If you are looking at a small red mark on an adult who did not have it ten years ago, cherry angioma is far more likely than hemangioma. Hemangiomas are primarily a childhood condition, with infantile hemangiomas appearing shortly after birth and usually fading by age five to seven.
For location-specific guidance on where cherry angiomas concentrate on the body, including why the legs and trunk accumulate them with age, see the cherry angiomas on the legs guide.
Depth and feel
Cherry angiomas sit right at the surface, forming that characteristic tiny dome you can see clearly under good light. A small cherry angioma feels like a tiny raised point on the skin surface. Hemangiomas, particularly cavernous adult hemangiomas, often extend deeper into the tissue. A hemangioma often feels like a slightly spongy mass that goes deeper than what you can see. If the mark has any real depth to it when you palpate gently, lean toward hemangioma and see a dermatologist.
Location context
Cherry angiomas favor the trunk, arms, and legs. If you notice a vascular lesion on the liver, spleen, brain, or in an unusual internal location (sometimes discovered incidentally via imaging), that is a hemangioma, not a cherry angioma. Cherry angiomas are a skin-surface phenomenon only.
How to tell cherry angiomas from petechiae
The blanching test above is the clearest dividing line. If a mark does not blanch, stop the identification process and book a doctor visit. Beyond the physical test, there are pattern differences that reinforce the diagnosis.
Onset pattern
Cherry angiomas appear gradually, one by one, over years. Petechiae tend to appear in sudden clusters. Waking up with a constellation of new flat red dots that were not there yesterday is a petechiae pattern, not a cherry angioma pattern. Cherry angiomas accumulate over time, not overnight. If you have noticed multiple cherry angiomas appearing suddenly, the multiple cherry angiomas suddenly guide covers when that pattern warrants a doctor visit versus normal aging.
Location and cause context
Petechiae are particularly common on the lower legs and feet, where capillary pressure is highest. They also appear wherever blood pooling or local pressure trauma has occurred. Cherry angiomas show up primarily on the trunk. Cause context also matters: petechiae have known triggers including blood thinners, low platelet counts, certain infections (including meningitis, in which case they may appear on the neck, face, or trunk rapidly), autoimmune conditions, and physical trauma such as coughing fits or childbirth. If you have any of these in your recent history and are seeing new flat red spots, treat that as petechiae until proven otherwise by a doctor.
Why cherry angiomas appear and hemangiomas do not (the cause difference)
Cherry angiomas are driven primarily by age-related changes in the skin's microvasculature. Hormonal shifts, sun exposure accumulation, and genetic predisposition all contribute. The connection to metabolic factors like diabetes has been studied as well. For that specific link, the cherry angiomas and diabetes guide covers the evidence in detail. Cherry angiomas are the body's normal response to decades of living in skin, not a pathological event.
Hemangiomas in infants are driven by abnormal vascular proliferation during development, usually resolving within the first few years of life without intervention. Adult hemangiomas are a distinct entity with less well-characterized causes, though they are also benign in the vast majority of cases.
Petechiae are caused by something breaking a capillary: whether that is physical force, platelet deficiency, clotting factor abnormality, infection, or medication effect. Understanding why the capillary broke is the medical question, not the mark itself. The Mayo Clinic lists platelet disorders, infections, and certain medications among the most common causes of petechiae in adults.
When red spots are a medical emergency
Petechiae warrant same-day or urgent care in any of these situations. Per NIH MedlinePlus on skin conditions, certain patterns of petechiae require immediate evaluation:
- Rapidly spreading petechiae, especially on the neck, face, or trunk. This is a potential meningitis flag and requires emergency evaluation.
- Petechiae with fever. Fever plus petechiae suggests infection with systemic involvement.
- Petechiae with unusual bruising, bleeding gums, blood in urine, or other bleeding signs. Platelet or clotting disorder territory.
- Petechiae in a child. Children's petechiae have a broader and more serious differential than adults.
- Any petechiae you cannot explain. No recent trauma, no medication change, no obvious cause. Do not wait.
Cherry angiomas are almost never urgent. The only exception is a cherry angioma that starts bleeding spontaneously, changing shape rapidly, or developing irregular borders. Those call for dermatologist evaluation. See the cherry angiomas spreading guide for more detail on the flags that warrant a doctor visit.
Press a glass against the mark. If it blanches, cherry angioma or hemangioma. If it does not blanch, see a doctor today. That is the only test that matters before you reach for any device or treatment.
When you can treat at home
Only one condition on this page has an at-home pathway: confirmed cherry angioma, in a clearly visible location, with the blanching test passed and none of the urgent flags above.
The checklist for at-home eligibility
All of the following must be true before proceeding:
- The mark is a small, smooth, raised dome, 1 to 5 mm.
- It is cherry red to dark purple.
- It blanches visibly under pressure.
- It has been stable in appearance for weeks to months.
- It does not bleed on its own.
- It is on the trunk, arms, or legs, in a location you can see clearly.
The plasma pen pathway
If all of those are true, the OcuraLife Plasma Pen is designed for exactly this use case. A 5-minute treatment per spot, with a small protective scab forming and resolving by Day 3 to 7, and clear skin visible by Week 2 to 3. Nine power settings let you dial in precisely for the size and depth of each spot. If the blanching test is negative, or if any of the urgent flags apply, the at-home pathway is not open. Book a doctor instead.
When in doubt, see a dermatologist
If you are not 100% certain the mark is a cherry angioma, see a dermatologist before any at-home treatment. The plasma pen is for confirmed cherry angiomas only. Specifically, book a dermatologist if:
- The mark does not blanch under pressure.
- The mark appeared suddenly overnight with other similar spots.
- You have a fever, unusual bruising, or any other systemic symptoms alongside the spots.
- The mark is changing size, shape, or color over weeks or months.
- It bleeds spontaneously, even occasionally.
- You simply are not sure which of the three conditions you are looking at.
The bottom line
Cherry angiomas are small, raised, blanching red domes driven by normal aging in adults over 30. Hemangiomas are deeper vascular growths that also blanch and are almost always benign but warrant dermatologist evaluation. Petechiae are flat, non-blanching red marks from broken capillaries, and the cause of the breakage is what matters.
Press a glass against any red mark you are unsure about. If it blanches, cherry angioma or hemangioma. If it does not, see a doctor today. For everything about cherry angiomas specifically, start with the complete cherry angioma guide. For the full treatment picture, the best at-home cherry angioma removal guide covers the plasma pen process end to end.
Related guides in this series
- Cherry Angiomas: Locations and Causes (the pillar)
- Cherry Angiomas on the Legs: Why and What To Do
- Cherry Angiomas and Diabetes: The Real Connection
- Multiple Cherry Angiomas Appearing Suddenly: When to Worry
- Are My Cherry Angiomas Spreading? When to See a Doctor
- Best At-Home Cherry Angioma Removal (the bridge)
Outbound references: NIH MedlinePlus, Skin Conditions, American Academy of Dermatology, Hemangiomas, Mayo Clinic, Petechiae.
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The OcuraLife Plasma Pen is built for this
Delivers focused plasma energy at the surface of the spot. Adjustable settings, single-use sterile tips. A small scab forms, falls off on its own, and the skin renews by Week 2 to 3. For confirmed cherry angiomas only, never for petechiae, never for hemangiomas, never for any mark that does not pass the blanching test.
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