You should try to find the trigger for the onset of hives in your baby, which commonly includes food, such as eggs, milk, beef and lamb, etc. Tropical fruits are also common triggers of hives, and you should actively avoid them after finding clear triggers and allergens. If the hives are fresh, you can observe them for 1-2 days, and in a few cases they can heal on their own. If it does not heal spontaneously, you can add paracetamol tablets or cetirizine drops and use the dose according to the instructions for about 1 week to cure. If the hives do not heal repeatedly, it is recommended to improve the serum allergen test first, and at the same time you can add Yu Ping Feng granules or compound glycyrrhetinic acid tablets for treatment.