Babies love long rashes, may be weak immunity, allergies and other reasons, it is recommended to improve the baby’s immunity, avoid contact with baby allergies, etc.. 1. Weak immunity: hand, foot and mouth disease, early childhood emergency rash, etc. can lead to baby rash, mostly viral infections, may or may not be accompanied by fever, generally do not need special treatment, to local symptomatic treatment. Parents should pay attention to encourage their children to exercise more, eat a balanced diet, in order to improve immunity, to avoid the occurrence of the above diseases. 2. Allergy: such as clothes, towels, quilts, moisturizers, etc. can cause allergy in babies, and it is recommended to replace them with skin-friendly or skin-irritating attenuating items. Avoid baby contact with allergens. It is recommended to go to the hospital in time to find out the cause of the disease, so as to facilitate symptomatic treatment. The above medication should be taken according to medical advice.