question: i think my infant had a childrens motrin allergy/ Ibuprofren allergy.im curious to know if the reaction stays in the system until treated/addressed or does it cure itself? my pediatrician said my son has excema and disregarded my concern I want to say he started slight skin rashing aound 6mo - around same time he got HFMD and was given infants motrin in the last year the rasChatDoctores n goes, his poops are like rocks/ clay like or black 75% of the time, and has had repeated coughs n congestion- I recently gave him the childrens motrin and he broke out in a burning hive rash aka excema don t think soo