I've Been Trying To Tx My Husband's Bed Sore For

I've been trying to tx my husband's bed sore for apps 2 weeks. He's end stage cancer is mobile but spends a lot sleeping. It's stomach which he also has a hernia on his belly so he can't lie on his stomach. I've been using DuoDerm pads. I've used triple paste and always keep covered. Needless to say, he's uncomftable