Sick Since Oliver finished his medicine for his bronchitis he's started being sick at almost every…

Sick

Since Oliver finished his medicine for his bronchitis he's started being sick at almost every dinner time and sometimes at lunch the other day he got a little rash on his face after eating red cheese so he hasn't had any since, but today he had normal cheese and came up with a rash again on his face but he's had it before the bronchitis and no problems then so don't know what to do now