Hello and welcome to HCM,
Blood in stools with associated nausea
and aversion from eating anything indicates infection of the gastrointestinal tract.
There are a number of bacteria which cause blood in stools. This condition is called dysentry
dysentriae is a common cause of dysetry.
Blood in stools may be caused by cancer of the intestines but that is associated with other constitutional symptoms like tiredness
, weakness, and loss of appetite.
I advise you to go for stool routine examination and culture.
The organism causing the infection can be isolated by the culture.
Cancer is unlikely at this age.
Thanks and take care.
Dr Shailja P Wahal