Hi thanks for asking a question.
I can understand your concern.
1.First you might have severe
gastroenteritis that can lead bleed in stool.Get your stool examined if it shows pus cells and bacteria then shigella dysentery like bacterial cause might be there. Tinnidazole and broad spectrum ofloxacine like antibiotic needed.
2.second you might have severe colitis by inflammatory or clostridia, vibrio or
salmonella like bacterial infection.stool culture might be useful for it and treated accordingly.
3.Sometime there might be severe parasite infection might be the cause like
amebic dysentery or
giardiasis.stool examination helpful for it.
4.If still no benefit ultrasound examination done to work up further.still further endoscopy examination may be needed that might reveal
inflammatory bowel disease or other cause like ulcer in git tract.
Meanwhile take prebiotics and maintain hydration by drinking adequate water.
Avoid spicy food.avoid smoking.
Take semisolid food for few days.
Take more fruit juice.
Wish you good health.
Dr.Parth goswami