Internal hemorrhoids are examined by anorectal examination, laboratory examination, imaging, and colonoscopy. 1. Anorectal examination: it includes anal visualization and rectal auscultation. Anorectal diagnosis refers to the doctor’s observation of the patient’s internal hemorrhoids through the “look” to see whether there is hemorrhoidal prolapse and the severity of the prolapse, but also to observe the patient’s skin around the anus whether there is eczema, infection and other conditions. Rectal diagnosis refers to the role of the doctor through the lubricant will wear gloves after the index finger into the patient’s anus for touching, is the diagnosis of internal hemorrhoids is an important method of examination. 2. Laboratory tests: fecal routine, occult blood test, blood routine, blood biochemistry test, coagulation function test and so on. 3. Imaging examination: mainly ultrasonography, the doctor through ultrasonography combined with the patient’s symptoms and anorectal examination to make a clear judgment on internal hemorrhoids. 4. colonoscopy: if the patient with blood as the main symptom, need to carry out colonoscopy, as the main method of differential diagnosis. The specific methods above are basically some of the ways to check for internal hemorrhoids.