A small red spot on a baby’s face may be caused by insect bite reaction, prickly heat, eczema and other diseases, or it may be caused by other diseases such as contact dermatitis. 1. insect bite reaction: insect bite reaction is mainly caused by insect bites, the child will be bitten by the site of erythema, blisters, redness, itching and other symptoms. 2. Prickly heat: Prickly heat is caused by the blockage of sweat ducts, and the main symptoms of the child are small blisters, pimples and itching on the skin. 3. Eczema: The etiology and pathogenesis of eczema are not yet clear, and it is considered to be related to internal and external factors. Children with eczema mainly manifested as erythema, edema, corn-sized papules, blisters, etc., and there will be erosion, oozing, flaking and other symptoms. 4. Other: contact dermatitis, folliculitis and other diseases can also lead to the phenomenon of small red spots on the face of the child. Infants have a small red dot on the face, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.