I'm Currently Taking Methadone For Couple Of Years Now. I've

I'm currently taking methadone for couple of years now. I've had two neck surgery's and one on my lower back, I get boils in my groin area and have seen a doctor, its something I have to deal with according to the doctor unless I want to get them removed. For a while now my boils have not been healing very well. I've taken other pain meds in the past... However since taking the methadone the boils seems to not heal? If I go back to taking the meds I took in the past ( morphine) would I get better results, is the methadone the cause?