Girls, good evening everyone! After childbirth, after six months, my h…

Girls, good evening everyone! After childbirth, after six months, my hand started itching, then my chest. I went to a dermatologist and she said it was atopic dermatitis. Creams, diet. And then the décolleté started itching and the eyes. I didn't think about the eyes at all, as if something got in there and that's it, itched and itched. Now it started itching and swelling, they said allergy. But in life before this time there were no allergies, I didn't know what allergy is. How can you find out about an allergy? Should you have blood tests for immunoglobulins and eosinophil proteins? Can you determine what allergy it is? Have you encountered such things