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What causes passing gas and bloody stools, and what should I do about it?

Mar 28, 2023 Source: Cainiu Health
Dr. Yang Ziqi
Introduction
In general, flatulence refers to gas passage, and defecation refers to bowel movement. Passing blood during gas release or bowel movements may be caused by hemorrhoids, anal fissures, colitis, colon polyps, or intestinal tumors. Patients can receive symptomatic treatment under a doctor's guidance. If symptoms are severe, prompt medical attention is recommended to avoid delaying diagnosis and treatment. It's also important to maintain healthy daily habits.

Generally speaking, flatulence refers to gas passage, while defecation refers to bowel movements. Passing blood during gas release or bowel movements may be caused by conditions such as hemorrhoids, anal fissures, colitis, colon polyps, or intestinal tumors. Patients should seek symptomatic treatment under the guidance of a physician. Specific analyses are as follows:

1. Hemorrhoids

Hemorrhoids are mainly classified into internal hemorrhoids, external hemorrhoids, and mixed hemorrhoids. Blood during gas passage or defecation is often associated with internal hemorrhoids. It is recommended to use hemorrhoid ointments or suppositories as directed by a doctor to reduce swelling of hemorrhoidal tissue. In severe cases, surgical treatment may be necessary.

2. Anal Fissure

Chronic constipation can cause hard, bulky stools to pass through the anal opening, resulting in a full-thickness longitudinal tear in the anal canal skin and formation of a small ulcer. This may lead to minor bleeding or significant pain. It is recommended to increase dietary fiber and fluid intake, perform potassium permanganate sitz baths, and apply lidocaine gel locally as prescribed to relieve pain. Topical application of nitroglycerin ointment can promote healing of the fissure. In some cases, procedures such as anal flap surgery may be required.

3. Colitis

Various factors can cause congestion and edema of the colonic mucosa. After defecation or gas passage, the damaged mucosal tissue may break down and bleed. It is recommended to take antibacterial medications such as levofloxacin hydrochloride tablets or ofloxacin capsules as prescribed by a doctor.

4. Colon Polyps

If a patient has colon polyps, bright red or dark red blood may appear during bowel movements. Prompt medical attention is advised, and the doctor may perform a polypectomy for treatment.

5. Intestinal Tumors

Bleeding during gas passage or defecation can also result from tumor rupture, intestinal ulcers, or damage to the intestinal wall. Treatment under medical supervision may include surgical resection and chemotherapy.

If symptoms are severe, patients should seek timely medical care to avoid delays in diagnosis and treatment. Maintaining healthy lifestyle habits and avoiding spicy or irritating foods is recommended to support recovery.

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