In long standing diabetes
,lower limb complications are multifactorial.The main factors are not only neuropathy but also ischemia.
The atherosclerotic process in diabetes is accelerated,multi segmental with predilection for vessels below popliteal artery
and tobacco consumption if present,further worsen the problem.
Diabetic peripheral neuropathy
leads to impaired sensations in lower limbs.
Although your doctor must have felt the arteries but still smaller arteries and capillaries can't be felt and hence you must get a Doppler studies for lower limbs done to know the partial occlusion,if present.