While the exact cause is unknown, aging, genetics, pregnancy hormones, and chemical exposure (like bromides) are the primary factors behind cherry angioma development.
You may notice small, bright red spots appearing on your trunk or arms as you get older. These spots, known medically as Campbell de Morgan spots, are the most common type of vascular growth on the skin. They are benign, meaning they are not cancerous and do not signal a serious internal disease in most cases.
Most adults will develop at least one by the age of 30. Despite their alarming color, they are simply a collection of small blood vessels that have clustered near the skin’s surface. Understanding why they appear can help you manage your skin health better.
What Causes Cherry Angioma?
Medical researchers have not identified a single, definitive reason for what causes cherry angioma? to appear. Instead, the consensus points to a combination of internal and external triggers that encourage capillary proliferation.
These lesions result from an overgrowth of endothelial cells, which line the blood vessels. Unlike bruises or rashes, these spots are actual growths of tissue. They are “idiopathic,” meaning they often arise spontaneously without a clear disease pathway.
Current dermatology focuses on four main pillars of origin: genetic predisposition, the natural aging process, hormonal fluctuations, and environmental exposure to specific chemicals. The growth mechanism involves a specific signaling pathway in the skin cells that tells blood vessels to multiply unnecessarily.
The Role Of Genetics And Age In Angioma Growth
Aging is the strongest predictor of developing these red moles. This association is so strong that they are frequently called “senile angiomas.” The structural integrity of the skin weakens over time, and the regulatory mechanisms that control blood vessel growth become less efficient.
Genetic factors also dictate who gets them. If your parents developed numerous red spots in their 30s or 40s, you have a higher likelihood of seeing them too. Recent studies identified somatic mutations in genes like GNAQ and GNA11 within the angioma tissue. These are not inherited mutations found in your entire body, but localized changes in the skin cells themselves.
MicroRNA levels also play a part. Research suggests that a decrease in “microRNA-424” in the skin leads to an increase in proteins (MEK1 and Cyclin E1) that drive cell division. This specific molecular breakdown explains why the blood vessels cluster so densely.
Primary Risk Factors For Development
| Risk Factor | Proposed Mechanism | Observation Notes |
|---|---|---|
| Advanced Age | Reduced regulation of angiogenesis (blood vessel creation). | Affects over 75% of people aged 75+. |
| Genetic Mutation | Somatic mutations in GNAQ and GNA11 genes. | Found in the lesion tissue, not the whole body. |
| Hormones (Prolactin) | Direct stimulation of vascular endothelial growth factors. | Common during pregnancy; may shrink postpartum. |
| Chemical Exposure | Toxic reaction causing capillary dilation and growth. | Linked to bromides and industrial solvents. |
| Climate | Possible irritation or tropical environment triggers. | Higher incidence noted in tropical regions. |
| Liver Health | Hormonal imbalance due to poor liver processing. | Often confused with spider angiomas (which are liver-linked). |
| Immunosuppression | Loss of immune surveillance over abnormal cell growth. | Seen in transplant patients taking cyclosporine. |
Hormonal Changes During Pregnancy
Pregnancy acts as a major trigger for many women. The sudden appearance of multiple red moles during gestation is often linked to elevated levels of prolactin, a hormone produced by the pituitary gland.
Prolactin helps prepare the body for breastfeeding but also has an angiogenic effect, meaning it encourages new blood vessels to form. This can cause existing angiomas to grow larger or new ones to “erupt” suddenly.
The good news is that hormonally triggered angiomas often regress or fade after delivery. Once hormone levels stabilize, the signal to maintain that extra vascular tissue diminishes. However, some may remain permanently.
Chemical Exposure And Environmental Links
Exposure to certain chemicals is a well-documented cause of eruptive cherry angiomas. This usually happens in industrial settings or through specific medications. Unlike age-related spots, chemical-induced angiomas tend to appear in large numbers over a short period.
Bromides And Medications
Bromides are chemical compounds found in some prescription drugs, baking ingredients, and sedatives. Research shows a direct link between chronic bromide exposure and the formation of angiomas. The element bromine can disrupt the skin’s structural balance.
Cyclosporine, a medication used to prevent organ rejection in transplant patients, also lists cherry angiomas as a possible side effect. The drug suppresses the immune system, which may allow vascular cells to proliferate unchecked.
Industrial Chemicals
Historical data from the National Library of Medicine notes that exposure to sulfur mustard (mustard gas) causes vascular changes leading to angiomas. While this is rare today, it highlights how intense skin irritation affects blood vessel formation.
Another chemical, 2-butoxyethanol, found in some cleaners and solvents, has also been implicated. If you work with harsh chemicals and notice a sudden outbreak of red spots, safety gear reviews are necessary.
While most red spots are harmless, distinguishing them from cancerous birthmarks is important if the outbreak is sudden and severe.
Medical Conditions Associated With Angiomas
In rare instances, a sudden, massive outbreak of cherry angiomas can signal a systemic issue. This phenomenon is called “eruptive cherry angiomatosis.” It differs from the gradual appearance of a few spots over years.
Eruptive cases have been observed in patients with lymphoproliferative diseases, such as Castleman disease or lymphoma. The mechanism involves the release of interleukin-6 (IL-6) and vascular endothelial growth factor (VEGF), both of which fuel tumor and blood vessel growth.
Metabolic conditions may also play a minor role. Some studies suggest a correlation between high cholesterol (dyslipidemia) and the number of angiomas on the body, though this is not a definitive cause.
When To See A Dermatologist
You generally do not need to treat cherry angiomas for health reasons. They do not turn into skin cancer. However, because they look similar to other skin conditions, proper identification is smart.
You should see a doctor if a spot bleeds often, changes shape, or has a dark, irregular border. These can be signs of nodular melanoma, which is aggressive and requires immediate care. Understanding what causes cherry angioma? helps in ruling out these more dangerous mimics.
Dermatologists use a tool called a dermatoscope to look closely at the lesion. A cherry angioma will show specific “lacunae” or lakes of red/purple/blue color, which confirms it is a benign vascular growth.
Differentiating Red Skin Spots
It is easy to confuse angiomas with petechiae or spider veins. The table below helps clarify the differences.
| Feature | Cherry Angioma | Petechiae | Melanoma (Cancer) |
|---|---|---|---|
| Shape | Dome-shaped, raised papule. | Flat, pinpoint spots. | Asymmetrical, irregular borders. |
| Color | Bright red to purple. | Red, brown, or purple. | Multi-colored (black, brown, tan). |
| Blanching | May fade slightly when pressed. | Does NOT blanch (fade) when pressed. | Does not blanch. |
| Evolution | Stable, slow growth over years. | Appears suddenly, fades like a bruise. | Changes size/shape rapidly. |
| Cause | Capillary overgrowth (Aging/Genetics). | Bleeding under skin (Trauma/Low platelets). | UV damage/DNA mutation. |
Removal Options For Cosmetic Relief
Since these spots are harmless, insurance rarely covers their removal. However, if a spot is in a place that rubs against clothing or bothers you esthetically, removal is simple and effective.
Electrocauterization
This is a common method where a doctor uses a small probe to deliver an electric current to the angioma. The heat seals the blood vessels and destroys the tissue. The scab falls off after a few days.
Cryosurgery
Liquid nitrogen is sprayed onto the spot to freeze it. This method is quick but may leave a small blister or white spot. It works best for smaller, flatter angiomas.
Laser Therapy
For the best cosmetic results, dermatologists often use a Pulsed Dye Laser (PDL). The DermNet database explains that PDL targets the hemoglobin (red blood cells) in the angioma without damaging the surrounding skin. The heat from the laser coagulates the vessel, causing it to shrink and disappear.
Shave Excision
For larger, raised lesions, a doctor might physically slice the growth off the skin surface. This allows them to send the tissue to a lab for analysis if there is any doubt about the diagnosis.
Attempting to remove these at home is risky. Picking or cutting them can lead to significant bleeding and infection because they are connected directly to blood vessels. Always consult a professional for safe removal.