My 8 year old daughter has been on miralax (polyethylene glycol) since she was a year old. For the past 2 years she has had a skin rash on elbows and knees. Any link possib?

DETAILS???? Why is the child using a laxative? If there is not a very, very good reason, this needs serious attention from a DR, preferably a gastroenterologist. No, the rash, probably eczema or psoriasis, is not due to miralax (polyethylene glycol). This is best addressed by a dermatologist.