Red spots on the body, may be related to mosquito bites, may also be caused by contact dermatitis, eczema and other reasons. 1. Mosquito bites: often appear in the hot summer, due to more mosquitoes outside, if you stay outdoors for a long time in the environment, it is easy to be mosquito bites, resulting in mosquitoes in the toxins retained in the skin of the bite, may cause red spots on the body, but also accompanied by significant itching, pain and other symptoms. 2. Contact dermatitis: especially some allergic people in contact with certain substances, such as wearing chemical fiber fabric clothing, application of soap, shower gel and other substances, is likely to cause skin allergies, induced by contact dermatitis may lead to red spots on the body, can be accompanied by itching, burning pain and other symptoms. 3. Eczema: the disease is usually associated with genetic factors, animal fur, pollen, food, ultraviolet light and other external factors caused by stimulation, which can lead to localized skin more red spots, but also accompanied by pimples, papules, skin redness and swelling and other symptoms. Red spots on the body, may also be caused by other reasons, if accompanied by obvious discomfort symptoms, should be as early as possible to seek medical attention, through the improvement of the relevant examination, diagnosis of the causal factors, by the doctor’s guidance for treatment.