HI Well come to HCM Thank for asking Your query being appreciated, such bleeding per rectum could only be happening in hemorrhoid and anal fissures condition demands immediate medical attention, if this is the constipation then it has to be relieved first and for that you need to start the stool softener like Isabgol, local application of hemostatic agent can be applied (Vitamin K and epinephrine ) it is just the emergency treatment else it has to be managed with surgical intervention, at it has to be clinically examined for differential diagnosis if it is not the hemorrhoid or fissures hope this information helps.