Bleeding piles. Successful is banding?

I m 27 yr unmarried girl. I had chornic constipation since teenager. I have been facing bleeding piles problem since 5 months. I hv consulted doctor in aiims . I m taking meds to stop bleeding piles but they are not working n they have not worked. Bleeding was stopped only fr few days n it started again as medicines stopped now i am again facing bleeding and aiims doctor have given me one month medication but it is still not working i have undergone rectum scan n abdominal scan which is normal . Also i hv been checked by protocosope by three different doctors that i have grade 1 piles. Aiims doctor has suggested me if conservative methods won't work then i ll be considered for banding. My question is how much amount of blood do we loose in piles. Because i loose 1 teaspoon approximately or little less. Also i have become anaemic. There's slight pain also n blood is red in colour. Though i have been confirmed that it is piles still i am scared of it. How successful is banding ?