Hell dear something coming out of annus is called piles you too have some problem ,it occur because of extra straining usually so avoid physical stress like gym,,weight lifting etc,,,it also occur when you are constipated so avoid constipation too yake fresh vegetable n juices ,,,take fiber avoid junk food,,,,take ispaghol or benfiber in morning,,,reguarding medicine take flagyl 400mg three times a day for 7 days ,,,,apply locally cream lignocaine 3times it will avoid pain if problem is still there consult surgeon then you need a minor surgery,,,,stay blessed