Hi
The blood in the stool is mostly due to constipation. When you drink less water and gets constipated that's when you pass hard stools and that leads to tear in your anus region and leads to anal fissures. That can be resolved easily. Please take plenty of water on daily basis and this can be treated by taking a syrup duphalac which makes your stool loose and please consult your doctor for topical application of gel.
Next Steps
please consult your doctor for further treatment
Health Tips
if this is neglected the anal fissures happens occasionally leading to haemorrhoids.