Increasing dietary fiber is beneficial for treating internal hemorrhoids by reducing and treating constipation. Constipation can lead to straining to pass hard, dry stool from the rectum. Excessive straining during a bowel movement strains the blood vessels in the anal canal, which leads to hemorrhoids.
According to a 2009 study published by the Mayo Clinic, men age 50 and under should try to eat 38 grams of fiber each day, while men age 51 and older should try to eat 30 grams of fiber each day. Women age 50 and under should consume 25 grams of fiber each day, while women over age 51 should consume 21 grams of fiber each day.
Excellent sources of dietary fiber include green vegetables and fruits such as apples. Dietary fiber also can be found in the form of supplements such as Metamucil, Benefiber and FiberCon.