Blood that is visible on the stool, on the toilet paper or found in the toilet bowl after a bowel movement is the most common symptom of internal hemorrhoids, according to WebMD. The anal skin may itch due to irritation from mucus, while large hemorrhoids may cause pain or discomfort.
A large and bulging hemorrhoid located in the anal canal can cause an individual to feel as if he needs to pass another stool after defecating, explains WebMD. Severe pain may be experienced if the anal hemorrhoids swell and are squeezed by the anal muscles. If the hemorrhoid is deprived of blood supply, resulting in what is known as a strangulated hemorrhoid, individuals require emergency treatment. External hemorrhoids most often cause rectal pain. In cases of thrombosed or clotted hemorrhoids, the pain is due to the pooling of blood under the skin. Some bleeding may also be present after bowel movements.
Hemorrhoids develop as a result of increased pressure in the lower rectum that causes the veins around the anus to swell, states Mayo Clinic. Increases in rectal pressure can be due to long periods of time spent sitting on the toilet, chronic constipation, straining during defecation, obesity and pregnancy. Individuals with insufficient fiber in their diets, those who engage in anal intercourse, and the elderly are at higher risk for developing hemorrhoids.