If your baby has obvious itchiness, you need to consider skin allergies. Since it is an allergy, the important part in solving the problem is to find the allergens and try to avoid them as much as possible. In the observation of allergens, the first thing to consider is what the baby is most likely to come into contact with at night, that is, his bed sheets and bedding, or pajamas, etc., so observe whether there are any factors in this regard, and if there is try to isolate the avoidance. In addition, in addition to the itchy body, observe whether there are other symptoms, such as nasal congestion, runny nose, sneezing, or previously had eczema, hives, to consider in addition to environmental factors, whether there are food factors. Because allergy symptoms, whether caused by food or environmental factors, are inherently aggravated at night due to the changing patterns of body fluids, even if the allergy is not caused by bed sheets or bedding, but by food, the symptoms can still be more pronounced at night. So to find the allergens, you need to take a full look. If the itching is pronounced, you can temporarily apply topical glycerine lotion or take oral cetirizine or loratadine to relieve the symptoms. However, these are the symptoms but not the root cause of the problem, to solve the itch of the fundamental key link is to find allergens, if you can not find clear allergens in life, if necessary, you need to go to the dermatology department to do the examination, such as allergen screening.