My daughter had the same problem when she was a baby. We used Sebamed for all (soap, baby shampoo, cream). I also used the special detergent super sensitive for babies without fragrance) to wash all her clothes, blanket, sheets (all connected with her skin). Change the diet of your food if you are still breastfeeding (our pediat found out that our daughter allergy to strawberries and its kind). Wish you good luck with the allergy test.