Swollen hands of baby vaccination may be caused by common adverse reactions, allergies, local infections, etc., which can be dealt with by cold and hot compresses, medication and so on. 1. Common adverse reactions: due to personal differences, the stimulation of drugs may lead to localized redness, swelling, hardness and other adverse reactions after the baby vaccination. In this case, within 48 hours, you can use appropriate ice packs to inhibit blood circulation and prevent the swelling symptoms from worsening. 48 hours later, you can use local hot compresses to accelerate blood circulation and promote the dissipation of swelling. 2. Allergy: Some babies may be allergic to the vaccine, and may have strong allergic reactions such as redness, swelling and itching on large areas of the hands after vaccination. This situation can be under the guidance of the doctor to apply cetirizine tablets, loratadine tablets and other drugs to play a certain anti-allergy effect. 3. Localized infection: after the baby vaccination, due to the lack of good wound care, resulting in the invasion of pathogenic bacteria and stimulation, can also cause the baby’s hands swollen symptoms. This situation needs to follow the medical advice to use iodophor, alcohol and other disinfection. At the same time, you can use erythromycin granules, cefadroxil granules and other drugs under the guidance of the doctor to play an anti-inflammatory role. If your baby’s hands are swollen from vaccination, you need to consult a professional doctor in time and listen to the advice of the doctor to deal with it accordingly.