The exact cause of symptomatic hemorrhoids is unknown. A number of factors are believed to play a role, including irregular bowel habits (constipation or diarrhea), lack of exercise, nutritional factors (low-fiber diets), increased intra-abdominal pressure (prolonged straining, ascites, an intra-abdominal mass, or pregnancy), genetics, an absence of valves within the hemorrhoidal veins, and aging. Other factors believed to increase risk include obesity, prolonged sitting, a chronic cough, and pelvic floor dysfunction. Squatting while defecating may also increase the risk of severe hemorrhoids. Evidence for these associations, however, is poor. During pregnancy, pressure from the fetus on the abdomen and hormonal changes cause the hemorrhoidal vessels to enlarge. The birth of the baby also leads to increased intra-abdominal pressures. Pregnant women rarely need surgical treatment, as symptoms usually resolve after delivery.
medical cause of Hematochezia
medical cause of Gastrointestinal bleeding
symptom of Vitamin K deficiency
medical cause of Hematuria
symptom of Diverticulitis
medical cause of Abdominal pain
symptom of Protein S deficiency
medical cause of Vaginitis