It seems like an acute fissure which is very painful and it bleeds on passing stool. You may take stool softeners like Syrup Looz at night time. Avoid non veg foods, take plenty of fluids and green leafy vegetables. If it is too painful you may try Anobliss cream which can be applied over the cut around 10 mins before you go to toilet. It will reduce the pain.
Health Tips
If you have a painless bleeding not reducing after 2 weeks you should have a surgeon do a per rectal examination to look for any lump in the rectum