As a diabetic, I’ve had experience with tough to treat and extremely slow to heal skin ulcers. All of these treatments (Manuka, vinegar, peroxide) cause unrelenting pain that doctor’s fail to treat. Take it from me - when you have a skin wound that is a constant source of excruciating pain, it’s pretty hard to accept adding to one’s misery by the use of Manuka, vinegar, or peroxide. It’s as barbaric as pouring salt into wounds as a form of torture.
Both Vitamin C and Vitamin E are essential for wound healing. You can mix some Vitamin E from a capsule with a small amount of powdered C and it may be less irritating to your wounds. They can also be taken internally, but fairly large amounts may be needed. If you want to do that, discuss it with your doctor, and/or Private mail me. Too much Vitamin E taken at one time can cause a large drop in blood pressure, so the amount has to be increased slowly over days. Too much C will cause diarrhea or burning gas, but then you just reduce the amount a bit until there are no such symptoms.