Could feeling my pulse in my anus after physical activity be a sign of hemmeroids or fissure ? sometimes blood in bowl also bright red.

Yes it could: Usually this is exactly what they teach you as a student: bright red blood - look for the source of bleeding close by: a fissure or a hemorrhoid. A primary care doctor's office could be your first stop to be examined for further treatments.

Could be hemorrhoids: Hemorrhoids are blood vessels, usually veins, in the anorectal area. They can get swollen kind of like varicose veins on ones legs. They can also be responsible for bright red blood with a bowel movement. A fissure can have some blood on the toilet tissue but is associated with more pain.