<s>[INST] My daughter gets severe hives frequently at least once a month. She has hep c from meth use. Also takes Percocet from back injury in Iraq. She keeps telling me the v.a. Can t find the reason why it reoccurs. My suspicion is from the hep c or meds. True? [/INST] IIN my opinion, your child seems to be suffering from an allergic tendency. It doesn't seem to be due to medications or hepatitis C infection as it's not persistent. Hive occurs due to hypersensitivity to any substance in the surroundings which the body doesn't accept as does any normal individual. It could be due to any aeroallergen, food products, insects, etc. You should try to find out an allergen 1st. Also, go for IGE and AEC lab tests to help the diagnosis. Antihistamines are the first line of therapy for urticaria. Diphenhy Chat Doctor.  </s>