Talk to Gastroenterologist on Anus Burning While Stool Passing

Hi dr I have been Suffering from anal burning for year actually its like when I pass the stool I feel intense burning please suggest medical department for this so that I can reach there its not like constipation but its different I am sure I don't have any fissure because it stops for weeks and then Happens again I cannot sit properly After toilet please prescribe Quick fix for pain releasing