### Human:\nmy 4 month old has hives i am breastfeeding him what could this be caused from\n\n### Assistant: hives indicate an allergy. so it could be caused from anything in his environoment -- something that he has touched (aundry detergent dryer softeners soap etc. ) or breathed (dust pollens etc). it does not have to be related to breast-feeding at all. finding a specific cause is often impossible.