There are so many reasons for bleeding per rectum
1. It may be due to your loos motion which injured your internal part of rectum.
2. It may be pail mass (pails) which is bleeding due to friction with stool.
3. It may be fissure in anal canal Wich is also due to your heavy dierrhoia.
Your disease is completely cureble if you want to treat I just want to know more symptoms about your issue then I can give you advice and treatment properly.
Next Steps
you should eat light food like moong beans soop, rice soop etc.
and if there is pain you should take sitz bath with Luke warm water+ allum powder.
Health Tips
don't worry your disease is completely cureble you will be completely cure.
take proper healthy food adequate sleep and always be stress free and always be happy.