Dear doctor

My son has a rash (coin shaped) that has been diagnosed as a topical ecema. he developed since a baby approx 2yrs. His legs are the main areas effected, but sometime they appear on his wrist and patch on his back & tummy.I have taken him to medical doctors over the years and they have constanly scripted steriod creams. Dovate, Betnovate, have been excllent creams that work instantly, however the side effect is thinning of the skin. Please help with a better treatment that has long term results.