Can omega 3 fish oil vitamins cause burning around the outside of the anus? If not what could be causing this? I have had hemmroids for the past 9 years caused during the birth of my son. They have not caused too many problems other than being pushed out during bowel movements and eventually go back in until the next. I have had some burning on the outside of the anus for about 3 weeks. I will ask my OB/GYN but that appt.isn t for another month. I am 46 year old female 5 ft 4 in. and 150 lbs. Take Toprol 1 x day 50 mg and hydrochlorothiazide 1 x day.