Diagnosing hemorrhoids typically starts with a brief physical exam and, in most cases, can be completed in a single office visit. Your doctor will look at the area, perform a quick internal check with a gloved finger, and possibly use a short lighted scope to see inside the anal canal. The whole process is faster and less involved than most people expect.
The Visual Inspection
The first thing your doctor does is simply look. External hemorrhoids and some advanced internal hemorrhoids that have pushed outside the body are visible without any instruments. Your doctor will check for swelling, skin tags, irritation, and any other issues around the anus. You may be asked to bear down as if having a bowel movement, which is called the Valsalva maneuver. This brief push can cause internal hemorrhoids to bulge outward, making them easier to spot and grade.
The Digital Rectal Exam
Next comes the digital rectal exam, where your doctor inserts a lubricated, gloved finger into the rectum. This takes about 30 seconds. It lets them feel for any masses, check the muscle tone of the sphincter, and detect tenderness or other abnormalities. Internal hemorrhoids are soft and often can’t be felt this way, so a normal digital exam doesn’t rule them out. That’s why your doctor may move on to a scope-based exam.
Anoscopy: The Most Common Diagnostic Scope
An anoscopy is the standard tool for confirming internal hemorrhoids. The anoscope is a short, hollow tube with a light that slides into the anal canal and gives a direct view of the tissue inside. It’s shorter than other rectal scopes because it only needs to reach the lower rectum, where hemorrhoids form. The exam takes a few minutes, doesn’t require sedation, and is done right in the office. You don’t need to fast or do any bowel preparation beforehand.
During the anoscopy, your doctor can see the size, location, and severity of any internal hemorrhoids and assign them a grade, which determines the best treatment approach.
How Doctors Grade Internal Hemorrhoids
Internal hemorrhoids are classified on a four-point scale based on how much they protrude from the anal canal:
- Grade I: The hemorrhoid bulges into the anal canal but doesn’t push out during a bowel movement.
- Grade II: The hemorrhoid pushes out during straining but slides back in on its own afterward.
- Grade III: The hemorrhoid protrudes and has to be manually pushed back inside.
- Grade IV: The hemorrhoid is permanently outside and can’t be pushed back in.
Grades I and II are generally managed with dietary changes, topical treatments, and other conservative approaches. Grades III and IV more often require a procedure. Knowing the grade helps you and your doctor decide on next steps.
When Additional Scopes Are Needed
If your doctor needs to see further up the digestive tract, they may recommend a proctoscopy or flexible sigmoidoscopy. A proctoscope is a rigid tube about 10 inches long with a light and lens at the tip, allowing a detailed view of the entire rectum. A flexible sigmoidoscope is longer, around 27 inches, and can reach past the rectum into the sigmoid colon, the last section of the large intestine. These are used when symptoms like bleeding could be coming from higher up or when the initial exam doesn’t fully explain what’s going on.
A flexible sigmoidoscopy sometimes requires a bowel preparation with an enema beforehand, though not always. If you do need one, you’ll typically give yourself two saline enemas at home a couple hours before your appointment. You can eat and drink normally; no fasting is necessary.
When a Colonoscopy Enters the Picture
A colonoscopy isn’t part of a routine hemorrhoid diagnosis, but your doctor may recommend one if your symptoms raise concerns about other conditions. Rectal bleeding, for example, can look identical whether it’s caused by hemorrhoids, a polyp, inflammatory bowel disease, or colorectal cancer. If you’re 45 or older and haven’t been screened, or if you have a family history of colorectal cancer, Crohn’s disease, ulcerative colitis, or a genetic condition like Lynch syndrome, a colonoscopy may be ordered to get a complete picture.
The U.S. Preventive Services Task Force recommends colorectal cancer screening for adults ages 45 to 75. People with higher risk factors may need to start earlier. A colonoscopy examines the entire colon and is repeated every 10 years for average-risk individuals.
What Else Doctors Rule Out
Part of diagnosing hemorrhoids is making sure the symptoms aren’t caused by something else. Several conditions share symptoms like bleeding, pain, or a feeling of fullness in the rectum. Your doctor will consider anal fissures (small tears in the lining of the anus), rectal prolapse (where rectal tissue slides out of place), fistulas (abnormal tunnels between the rectum and skin), inflammatory bowel disease, colorectal polyps, and, less commonly, rectal cancer.
Bright red blood on toilet paper or in the bowl is the classic hemorrhoid symptom, but it can also point to a fissure or a polyp higher up. Darker blood, changes in bowel habits, unexplained weight loss, or pain that doesn’t match the typical hemorrhoid pattern are signs that prompt doctors to investigate further with imaging or a colonoscopy.
What to Expect at Your Appointment
For a standard hemorrhoid evaluation, there’s very little you need to do ahead of time. No fasting, no special diet, no enema unless you’ve been specifically told to prep for a sigmoidoscopy. Wear comfortable clothing. You’ll likely be asked to lie on your side with your knees drawn toward your chest, which gives the doctor the easiest access.
The physical exam and anoscopy together usually take under 10 minutes. You may feel pressure or brief discomfort, but most people describe it as more awkward than painful. If you’re experiencing severe rectal pain or active bleeding, let the office know when you schedule. In some cases, they’ll adjust or skip the bowel prep to avoid making things worse. Many people leave with a diagnosis and a treatment plan the same day.