Hemorrhoids vs. Anal Fissure: How to Tell and How to Treat

Two Common Conditions That Get Confused

Hemorrhoids and anal fissures are two of the most common conditions causing rectal bleeding, pain, and discomfort. Patients (and sometimes clinicians) often lump them together — but they are distinct conditions with different mechanisms and different treatments.

Getting the diagnosis right matters because treating a fissure as a hemorrhoid (or vice versa) often fails. At Zimmer Medical Group, we evaluate these symptoms regularly and can usually distinguish them with a careful history and exam.

What Hemorrhoids Are

Hemorrhoids are dilated venous structures in the lower rectum and anus. Everyone has hemorrhoids — they are normal anatomy. Hemorrhoidal disease occurs when these structures become symptomatic from straining, prolonged sitting, pregnancy, chronic constipation, chronic diarrhea, or genetic predisposition.

Two main types:

• Internal hemorrhoids — above the dentate line; usually painless because the lining lacks somatic pain fibers; primary symptoms are bleeding and prolapse
• External hemorrhoids — below the dentate line; have pain fibers; can cause significant pain when thrombosed (a clot forms inside)

Internal hemorrhoids are graded:

• Grade I: bleed but don't prolapse
• Grade II: prolapse during straining but spontaneously reduce
• Grade III: prolapse and require manual reduction
• Grade IV: permanently prolapsed

What Anal Fissures Are

An anal fissure is a tear in the lining of the anal canal, usually at the back midline. The hallmark is pain — often described as cutting or razor-like — during and after a bowel movement, sometimes lasting hours.

Fissures often start with passage of a hard or large stool. The tear creates a cycle: the pain causes the internal anal sphincter to spasm, which reduces blood flow to the area, which prevents healing, which causes more pain with each subsequent bowel movement.

How They Feel Different

| Feature | Hemorrhoids | Anal Fissure | |---------|-------------|--------------| | Pain pattern | Often painless (internal); sudden severe pain (thrombosed external) | Sharp, cutting pain during and after BM | | Pain duration | Constant if thrombosed; otherwise intermittent | Builds during BM, lasts minutes to hours after | | Bleeding | Bright red, often dripping into bowl | Bright red, on toilet paper or thin streak on stool | | Itching | Common | Less prominent | | Lump | Soft mass that may protrude | Usually no visible lump (sometimes "sentinel tag") | | Triggers | Prolonged sitting, straining, constipation | Hard stools, constipation, sometimes diarrhea |

The presence of significant pain — particularly the classic "cutting" pain with bowel movements — is the strongest clue for fissure.

Important: Don't Self-Diagnose Bleeding

Both hemorrhoids and fissures cause bright red blood. But several other conditions can cause rectal bleeding:

• Colorectal cancer or polyps
• Inflammatory bowel disease
• Diverticular bleeding
• Angiodysplasia

Self-diagnosis of "hemorrhoids" without evaluation can delay diagnosis of more serious conditions — particularly in patients over 45, those with family history of colon cancer, or those with concerning features (weight loss, anemia, change in bowel habits, dark blood, blood mixed with stool).

See our colon cancer screening guide for who should be screened and when.

Conservative Treatment for Hemorrhoids

Most hemorrhoids respond well to conservative care:

Stool Softening

The single most important intervention. Hard stools and straining are the major drivers:

• 25–35 grams of fiber daily, gradually increased
• Adequate hydration (often inadequate in Florida heat)
• Psyllium (Metamucil) or other soluble fiber supplements
• Stool softeners (docusate) for short-term use
• Polyethylene glycol (Miralax) for chronic constipation

Bowel Habit Changes

• Don't strain
• Don't sit on the toilet for extended periods (no reading, scrolling)
• Respond promptly to the urge to defecate
• Avoid prolonged sitting on hard surfaces

Topical Treatments

• Witch hazel pads (Tucks) for symptom relief
• Hydrocortisone cream short-term for itching and inflammation
• Lidocaine-containing creams for pain
• Avoid prolonged use of steroid creams (skin atrophy)

Sitz Baths

Warm water sitz baths 2–3 times daily, particularly after bowel movements, provide significant symptomatic relief.

Procedures for Persistent Hemorrhoids

For hemorrhoids that don't respond to conservative care:

• Rubber band ligation — outpatient procedure for grade I-III internal hemorrhoids; effective and well-tolerated
• Sclerotherapy and infrared coagulation — alternatives for smaller hemorrhoids
• Hemorrhoidectomy — surgical removal for grade III-IV or thrombosed external; more painful recovery but definitive
• Stapled hemorrhoidopexy — alternative surgical approach
• Thrombosed external hemorrhoid excision — within 48–72 hours of onset, surgical excision provides faster relief than waiting for spontaneous resolution

Treatment for Anal Fissures

The treatment principles are different — focused on relaxing the sphincter spasm and allowing the tear to heal:

Conservative Measures

• Aggressive stool softening and fiber (same as hemorrhoids)
• Sitz baths to relax the sphincter and improve blood flow
• Adequate water intake

Topical Therapies

• Topical nitroglycerin (Rectiv) — relaxes the internal sphincter; common side effect is headache
• Topical calcium channel blockers (diltiazem, nifedipine) — similar mechanism with fewer headaches; usually compounded
• Topical lidocaine — for symptomatic relief

Topical therapy heals roughly 60–80 percent of acute fissures.

Botulinum Toxin Injection

For chronic fissures not responding to topical therapy:

• Botox injection into the internal anal sphincter
• Temporarily relaxes the muscle, allowing healing
• Effective in roughly 70–80 percent of chronic fissures
• Risk of temporary mild incontinence

Surgery

For chronic fissures that fail medical therapy:

• Lateral internal sphincterotomy — small cut in the internal sphincter to release the spasm
• Highly effective (>95 percent healing rate)
• Small risk of incontinence (typically minor)
• Outpatient procedure

Special Situations

Pregnancy

Both hemorrhoids and fissures are very common in pregnancy. Conservative treatment is the mainstay during pregnancy. Most resolve postpartum, though some require treatment.

Recurrent or Atypical Fissures

Fissures in unusual locations (not at the back midline), multiple fissures, or fissures that fail standard treatment should prompt evaluation for inflammatory bowel disease, sexually transmitted infections, or other conditions.

Thrombosed External Hemorrhoids

These cause sudden severe pain and a visible tender lump. Acute treatment options:

• Within first 48–72 hours: incision and clot removal provides faster relief
• After 72 hours: usually managed conservatively with pain control and stool softeners; symptoms typically improve within a week

Keeping It From Coming Back

Both conditions recur for the same reason they started: hard stools and straining. The maintenance plan is simple, but the details are where patients go wrong.

The stool plan, made specific

Fiber works only with enough water behind it, and the increase should be gradual over a couple of weeks to avoid bloating. If a fiber supplement is not enough, daily polyethylene glycol is safe for long-term use and is my usual next step for chronic constipation. Feet on a small footstool during a bowel movement straightens the angle of the rectum and reduces straining; it is inexpensive and it works. The NIDDK's guide to hemorrhoids covers the same measures in detail, and our hemorrhoids condition page summarizes the treatment ladder.

The medications that quietly cause hard stools

Opioid pain relievers, iron tablets, some blood pressure medications, and drugs with drying side effects such as older antihistamines are common hidden causes. If a fissure or hemorrhoid flare started around the time a new prescription did, bring the bottle in; a substitution often solves the problem. Topical steroid creams such as hydrocortisone relieve itching but thin the skin with prolonged use, so they belong to a week or two, not a bathroom shelf. Alternating constipation and diarrhea with cramping suggests irritable bowel syndrome, which needs its own plan; our IBS versus IBD article explains how we tell them apart from Crohn's disease, which can also cause atypical fissures.

Screening is the other half of the visit

A visible source for bleeding does not cancel colon cancer screening. The USPSTF recommends screening for colorectal cancer starting at age 45 for average-risk adults, and if you are due, rectal bleeding is a reason to schedule it now rather than a reason to postpone it. Anyone with colon polyps on a previous exam follows the surveillance schedule in our polyp results guide. MedlinePlus's anal disorders page is a plain-language reference for the conditions covered here, and our gastrointestinal team coordinates colonoscopy and banding when they are needed.

When to See Your Doctor

For evaluation of hemorrhoids/fissures:

• Symptoms not improving with 2–4 weeks of conservative care
• Significant or recurrent bleeding
• Severe pain
• Lump that isn't resolving
• Any concern for thrombosed hemorrhoid (sudden pain with palpable lump)

For evaluation of all rectal bleeding:

• Age 45 or older
• Family history of colon cancer or IBD
• Weight loss, fatigue, or other systemic symptoms
• Change in bowel habits
• Dark blood, blood mixed throughout stool, or melena
• Bleeding not clearly attributable to a visible source

The American Society of Colon and Rectal Surgeons provides additional patient resources.

Persistent rectal pain or bleeding? Contact Zimmer Medical Group for an exam, the right diagnosis between hemorrhoids and fissure, and a treatment plan tailored to which condition you actually have.