A newborn baby with a lot of small red rashes on the head may be eczema, prickly heat. Eczema should be treated with glycerin lotion as prescribed by the doctor; prickly heat does not require treatment. 1. Eczema: there may be a red rash on the head, accompanied by yellow mucus exudation and itching. In the case of more exudate, it is better to apply wet compresses with diluted aluminum acetate solution; when the skin is red and itchy without vesicles and exudate, it can be wiped with glycerin lotion. 2. prickly heat: also known as heat rash, mostly appear in the clothes cover or repeated friction parts such as neck, armpits, waist, trunk and attached femur, etc., because of the hot weather, too much wrapping, so that the newborn baby body temperature, sweat is not easy to evaporate, sweat glands blocked due to the distribution of dense, sweating increased significantly. Keeping the area cool and reducing clothing coverage can reduce the symptoms. The rash usually takes 1 week to resolve completely. Wearing light-colored, loose-fitting, clean clothing and avoiding perspiration can prevent heat rash. All of the above medications should be used under a doctor’s supervision, avoid self-medication. There are many other causes of small red rashes on the head of newborns. It is recommended to seek prompt medical attention from a specialist who can evaluate the condition, complete the relevant tests and provide targeted treatment or therapy.