What causes small red spots on the body? Could they be vascular nevi?

Generally, the appearance of small red spots on the body is not necessarily due to vascular nevi; they may also be related to mosquito bites, subcutaneous bleeding points, eczema, contact dermatitis, and other factors. Patients are advised to follow medical guidance for symptomatic treatment. Specific analyses are as follows:

1. Vascular Nevus

Vascular nevus is primarily caused by congenital vascular developmental abnormalities during the embryonic period and is commonly seen in infants. Additionally, obesity, use of hormonal medications, cosmetics, and similar factors may also trigger it. A vascular nevus may manifest as blood vessel dilation, cellular proliferation, or small red patches on the skin. Therefore, the aforementioned condition could be caused by a vascular nevus. These nevi often regress spontaneously without special treatment. If the nevus abnormally enlarges, surgical removal, laser therapy, or radiation therapy may be performed under medical supervision.

2. Mosquito Bites

Summer is the season when mosquitoes thrive. Without proper precautions, individuals may get bitten by mosquitoes, which can lead to the appearance of small red spots on the body. Usually, no specific treatment is required. However, if itching occurs, washing the affected area with soapy water may help relieve symptoms, and the spots will gradually fade away.

3. Subcutaneous Bleeding Points

When the skin experiences external pressure or impact, local capillaries may rupture, resulting in small red spots known as subcutaneous hemorrhages. This condition typically does not require special treatment, and the red spots will naturally resolve over time.

4. Eczema

Eczema is an inflammatory skin condition triggered by various internal and external factors, characterized by red spots and itching. Under a doctor's guidance, patients may use medications such as loratadine tablets or calamine lotion for treatment.

5. Contact Dermatitis

Some individuals may develop allergic reactions after exposure to allergens—for example, using low-quality cosmetics—leading to red spots on the skin accompanied by itching. Under medical supervision, patients may take antihistamines such as loratadine tablets or cetirizine hydrochloride capsules for treatment.

If patients experience any discomfort, they should promptly seek medical attention at a hospital to avoid delays in diagnosis and treatment.