Yes, there is a treatment that is known to heal diabetic foot ulcers reliably. It's called Hydrobaric Oxygen Therapy (HBOT). Basically you go every day for 1.5 hours treatment inside a chamber that operates at 2x atmospheric pressure. It makes your ears pop, but is safe. Cost in Canada is around $150/session. The HBOT therapist will tell you haw many sessions will be necessary and what other treatments you will need. During the treatment you will be breathing pure oxygen. Oxygen has really good healing properties and your wound will heal faster than without HBOT. You may be advised to go for "Debridement" first, which is a doctor or surgeon cutting away any dead tissue. I hope this helps you.