The body for no reason like mosquito bites, may be due to: 1, mosquitoes or flea bites, pay attention to the bedding in the sun, indoor electric mosquito incense, the parts of the bumps rub flower lotion or wind oil. 2, due to the damp living environment, or allergies caused by hives. The company’s main goal is to provide a solution to the problem of the problem. Rub the affected area with tretinoin urea ointment and take oral vitamin C, calcium tablets and paracetamol.4. If the bumps are red and appear mainly on the forehead and back, consider folliculitis, which is caused by bacterial infection and inflammation of the follicular pores. Use metronidazole gel to rub the affected area and take amoxicillin orally. Do not eat greasy food during the treatment period, avoid alcohol, and do not bathe in water that is too hot to reduce the stimulation of the skin.