i have burning sensesation in my leg after i take food, at least 2-3 times in a day for more than one hour. Also, when I pass stool, again there is burning in anus. While sitting in office, i feel a warm air around my anus and littel pain while sitting on chair. this has been for the last 4-4 months, i visited 2-3 doctors but could not get the right treatment. Please suggest