Six-month-old babies with hives should look for possible triggers, and can be treated with antihistamines, as well as topical antipruritic agents. If your six-month-old baby develops hives, you should look for possible triggers. If it’s caused by an infection, you can actively treat the infection; if it’s caused by contact with allergic substances, you should avoid further contact with them, such as pollen, willow flakes, and animal hair, etc. You can also take antihistamines, including loratadine syrup, to treat it. At the same time, you can take antihistamines for treatment, including loratadine syrup, cetirizine syrup and so on. In addition, topical antipruritic agents can be used to relieve the itching, including glycerite lotion. Six-month-old babies with hives should go to the hospital in time for examination, and the use of the above drugs should pay attention to follow the doctor’s instructions.