The Fecal Occult Blood Test
... The fecal occult blood test is one of a variety of colorectal cancer screening tests. When doctors test for fecal occult blood, they are testing for the presence of microscopic or invisible blood in t...

Signs and symptoms
... Signs and symptoms usually depend on the location of the hemorrhoids: Internal hemorrhoids. You can''t see or feel these hemorrhoids. But straining or irritation from passing stool can injure a hemorr...

Causes
... Hemorrhoids can develop from any increase in pressure in the veins in the lower rectum. Common sources of pressure include: Constipation and the accompanying extra straining Diarrhea and the continuou...

Screening and diagnosis
... As a general rule, see your doctor if your hemorrhoids don''t improve with self-care, cause pain, or bleed frequently or excessively. The most common sign of internal hemorrhoids is rectal bleeding. B...