Sudden cramps in stomach with very small and normal frequent bowel movements, which causes anus pain. what is this?

Cramps: The abdominal cramps are nonspecific and could be the beginning of an intestinal tract viral infection, food poisoning or intolerance to some food you ate. Anal pain could be from spasm or the presence of an anal fissure. Avoid eating harsh fiber or spicy foods,apply warm water compresses to your anus, and insert a glycerin rectal suppository for easier passage of stool. See your MD as needed.