Yes, you should visit the doctor after taking prior appointment.If there is not any severe bleeding presently then you should not worry.You may have the prior appointment with a surgeon and have the physical examination done by him.
, proctoscopy may be done to know the underlying cause and locate the exact source of bleeding.
if severe enough may also cause bleeding and should be treated with stool softener
like liq paraffin
and tablet like dulcolax. You should also include high fibres & raw fruits, vegetables in diet to treat the constipation in a natural way