I can't comment on whether it is serious or not without examination. However, any blood in the toilet is not normal - and requires a colonoscopy after the age of 50 for further evaluation.
Things like hemorrhoids or anal fissures are possible, but you don't want to miss any cancer or polyps. It is very likely that your PCP will schedule a colonoscopy - if not, you should definitely push for one.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b
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We have alot of natural products you might want to check out, check them out with your doctor too!
Best wishes