Hi Devender, Welcome to HealthcareMagic Forum.
I think you are Talking about Tarsal Tunnel Syndrome
which is a compression neuropathy of the Tibial Nerve
which causes Pain, Numbness and Altered sensations. The causes for this are various and exact cause has to be ruled out to treat the cause and cause.e exact cause has to be found out through Blood Work up and X ray. Since you are diabetic for past 7 years, there might be some neuronal degeneration. Get your urinalysis done along with fasting serum glucose level, hemoglobin A1C, blood urea nitrogen (BUN), creatinine, complete blood cell count, erythrocyte sedimentation rate
and vitamin B12
You might want to consult a Orthopedist and Neurologist
and Discuss your treatment Strategy.
Wish you Good Health.