The Average Variable Cost curve is never parallel to or as high as the Average Cost curve due to the existence of positive Average Fixed Costs at all levels of production; but the Average Variable Cost curve asymptotically approaches the Average Cost curve from below.
Included: Blood from constipation and anal fissure tear; Causes of Blood in Stool. Anal Fissure. If no diarrhea, most of these children have a small tear in the anus. This is called an anal fissure. Anal fissures usually are caused by passage of a large or hard stool. This is the cause in 90% of children with blood in the stools. Strep Skin Infection. A Strep skin infection around the anus can also cause blood-streaked stools. Bacterial Diarrhea. If also has bloody diarrhea, a gut bacterial ...
Read streaks on the surface of the stool may appear in most of above mentioned causes (if bleeding is slow), or in: 1  Duodenal ulcer or cancer. 2  Ischemic colitis (due to abdominal atherosclerosis) 3  Microscopic colitis. 4  Appendicitis. Celiac disease.  Intestinal 1  worms. Small intestinal polyps or lymphoma.