Red dots on hands may be caused by allergies, fungal infections, vascular nevi, capillary hemangioma and other factors. 1. Allergy: contact with allergy-inducing substances, such as pollen, animal dander, etc., the hands may have an allergic reaction, resulting in localized small red spots. Mosquito bites cause papular urticaria, which is also the main cause of localized red spots. 2. Ringworm: Fungal infection of the hands may cause ringworm, resulting in small blisters, small red spots, itching and flaking. 3. Vascular nevus: Vascular nevus is a systemic disease, mainly divided into hemangioma and vascular malformation, manifested as the appearance of dark red or burgundy red flat or slightly raised nodular thickening of superfluous organisms on the surface of the body, which may also lead to the local appearance of small red dots. 4. Cherry-like hemangioma: cherry-like hemangioma may be congenital benign hemangioma, the cause and mechanism are still unclear, the typical symptom is the appearance of the skin surface elevated, soft, bright red spots. Red dots on the hands, it is recommended to pay attention to the care of the affected area and the accompanying symptoms, if necessary, go to the dermatology department of the hospital for consultation. First determine the type of disease, and then give targeted treatment.