Tripple bypass has nothing to do with circulation of feet.
Your symptoms on feet seem to be due to peripheral neuropathy
which may be caused by diabetes,alcoholism
,VIT B 12 deficiency etc.
As far as your rash between ties is concerned,it seems to be due to fungal infection
of feet and can be cured by local application of antifungal creams like CLOTRIMAZOLE
Abnormal sensations in feet can be due to fungal infection of feet.
You must consult your doctor and subject yourself for physical examination and relevant investigations.