Hi, Thanks for posting in HCM. Numbness and burning sensation, especially in the extremities like legs is suggestive of Vitamin B12 deficiency. Since you already have a history of its deficiency, it would have occurred again and became symptomatic. What the doctor has advised about B12 injection to be taken every alternate day is right. You need to take it for 5 days alternately at a stretch of 10 days. Meganeurone forte can be taken once everyday and can be continued for a month. Since this is the only water soluble vitamin stored in the liver, replenishing by medications would restore its levels back to normal. Kindly consume along with it food rich in Vitamin B12 like liver, curds and probiotics regularly to prevent its deficiency in future. Also you can get an Upper GI endoscopy done to see if there is any abnormality in gastric mucosa as intrinsic factor secreted by gastric mucosal cells is required for Vitamin B12 absorption. Hope the information provided would be helpful. All the best and wish you speedy recovery.