A 70-year-old male patient gets unbearable burning sensation in both the soles especially at night while in bed since two years. No h/o Diabetes. Controlled Hypertension since 30 years. Nerve conduction study normal. B12 in normal range, calcium folic acid WNL.
Put on Cap. Pregabalin 75 bd , Vit B12, calcium. No relief. What would be the reason and management of the burning sensation?