The following conditions are common in infants with red dots on their arms: 1, the age of small skin is thin and tender, the temperature of the surrounding environment or contact with non-cotton clothing can cause red dots, most do not require special treatment, to keep the local skin clean and breathable. 2, eczema, generally red dotted or flaky, with flakes on it can be accompanied by itching, the temperature of the surrounding environment will increase when the rash, easy to repeatedly, up and down, and 3, mosquito bites, local dotted or papular, can be accompanied by itching. In serious cases, you can apply hormonal ointments. 3, mosquito bites, localized dotted or papule-like, can be accompanied by itching, because of the local inflammatory reaction caused by the iodophor local wipe 1-2 times to subside.