I understand your problem and will try to guide you at my best.
Non healing ulcers can be of three types.
1...venous stasis ulcers which are common in patients having history of leg swelling or varicose veins
or in people with history of blood clots
in superficial or deep veins of leg.
2...neurotrophic ( diabetic ) ulcers.Neuropathy and peripheral artery disease
often occur together in diabetes
( neuropathy ) results in loss of foot sensations resulting in increased chances of trauma and infection.Neuropathy symptoms include tingling,numbness ,burning and pain.
3..Arterial ( ischemic ) ulcers due to poor circulation in legs due to diabetes or hypercholesteremia,smoking etc.
The management of such condition requires a multidisciplinary approach in a very good hospital.
Patient requires a thorough investigations in the form of blood tests,x - rays,MRI and CT scans and non invasive vascular studies to formulate a treatment plan.