Medication
Medications may also cause hives. [6] This can be tricky to be dealed with if you are currently treating a serious medical problem. It may take time to associate your medication with the appearance of these itchy welts on your skin, but you should call your doctor’s attention to it once you notice or suspect that your medication might be a trigger for you. If you are on multiple medications, your doctor may try to narrow the specific trigger down and swap it with one that does not trigger your symptoms. Medications that may trigger hives include antibiotics, such as penicillin and sulfa, and pain medications like ibuprofen and aspirin.