Since april 2015 i have hard stool with orange mucus and blood and little pain of sigmoid colon,i did crp and it was normal,i'm 20 yrs old .

Mucus: Perhaps you have a rectal or anal fissure or hemorrhoids with some mucus with a tint of blood and constipation. Sigmoid diverticulitis,although possible, would be unusual at your age. Infection in the intestinal tract is unlikely in the absence of diarrhea. Drink adequate amounts of fluid, take a stool softener, good fiber intake or take metamucil. Warm baths ,applications of anusol ointment help