Welcome to Healthcare Magic.
Blood in the stools along with lime can be due to many causes.
It may be due to ulcers, fragile veins, infections with bacteria or parasite in the gut are prominent possibilities.
Sometimes eroded arteries or malignancies can also causes similar symptoms.
Ideally you should get a complete blood counts, ESR
and stool for ova and cyst
should be checked.
I hope the advise will be helpful for you.