Small red dots on the body are painless and itchy, which may be caused by hemangioma, allergic purpura, spider nevus and other factors.
1. Hemangioma: If there is a balance imbalance between angiogenesis inhibitory factor and angiogenesis factor, it will lead to abnormal transformation of local microenvironment and endothelial cells, which will cause abnormal proliferation of vascular endothelial cells, and make the patient have the symptom of small red dots on the body that don’t hurt or itch.
2. Anaphylactic purpura: If the patient is exposed to allergic substances, such as dust mites, dust, pollen, etc., it will lead to an increase in the permeability of the local capillaries, thus triggering vascular hemorrhage and inflammation, so that the patient appears to have small red dots on the body without pain or itching symptoms.
3. Spider nevus: If the concentration of estrogen in the patient’s blood rises, it will cause the vascular endings of small arteries in the skin to expand, resulting in the formation of spider nevus, which will cause the patient to develop small red dots on the body without pain or itching.
There are many reasons that lead to long red dots on the body without pain and itchiness, you need to go to the hospital in time to improve the examination, and give targeted treatment.