Chronic constipation since childhood.it's been a week i have morning stomachaches,my stool is soft sticky dark green.(havn't eaten green vegetables)?

More Fiber And Water: Stools can vary in color in spite of diet. Most common cause of constipation is inadequate dietary fluid & fiber. Eating a well balanced diet: fresh fruits, fresh vegetables, whole grains, beans, nuts etc; combined with minimum water intake of 48 ounces (more is better) is best way to prevent constipation. Recommended daily fiber intake for adults is 38 grams for males, 26 grams for females.