The SITZMARKS® Test can help your health care provider diagnose these conditions: 

Bowel Obstruction – WebMD states that a bowel obstruction happens when either your small or large intestine is partly or completely blocked.Happy Couple

Colonic Inertia – describes colonic inertia as a condition in which the nerves and/or muscles of the colon do not work normally.

Constipation – Depending on your diet, age and daily activity, regularity can mean anything from three bowel movements a day to three a week. WebMD provides more information.

Diverticular Disease – According to the Cleveland Clinic, diverticular disease consists of two conditions: diverticulosis and diverticulitis. Diverticulosis is the formation of several tiny pockets, or diverticula, in the lining of the bowel. Diverticula, which can range from pea-size to much larger, are formed by increased pressure from gas, waste, or liquid on weakened spots of the intestinal walls.
Functional Outlet Obstruction – In Medscape Today, Dr. Yehuda Ringel, MD, defines functional outlet obstruction as “abnormal defecation associated with delay or unsuccessful passage of stool through the rectum and anal canal.”

Hemorrhoids – WebMD are defined as  swollen blood vessels of the rectum. 
Hypomotility –  The Right Diagnosis defines this condition as a digestive disorder where the intestinal walls are unable to contract.

Irritable Bowel Syndrome (IBS) – According to the Mayo Clinic, Irritable Bowel Syndrome (IBS) is a common disorder that affects the large intestine (colon), commonly causes cramping, abdominal pain, bloating, gas, diarrhea and constipation.