Yesterday when I nursed my baby, she ended up with hives on the side of the face that touched my body/clothes. I have not changed any detergent nor sprayed or use anything fragrant/perfume. I am so baffled. The hives were so big batch and bad. But they go away after 30mins on their own. What could have triggered?

Was there like a new coat of paint , new humidifier or something sprayed into the environment. Their skin is very sensitive so it is easy for them to get hives . Don't think it is too much of a concern just monitor. Did you feed baby anything else besides milk? And you are breastfeeding right? Did you eat any food out of the norm as that may cause hives