"Could the absence of blood in stool indicate colorectal cancer?"

Hemorrhoid and Anal Fissure May Cause Non-bloody Bowel Movements

Non-bloody bowel movements do not necessarily indicate colorectal cancer, but may be caused by diseases such as hemorrhoids or anal fissures. It is recommended that patients promptly seek medical attention, undergo relevant examinations, and receive targeted treatment after a clear diagnosis is made.

1. Hemorrhoids

Hemorrhoids occur due to prolonged sitting, constipation, or other factors, leading to engorgement and dilation of the venous plexus in the lower rectum or anal canal. Patients with hemorrhoids may experience incomplete evacuation or blood in stool, although in some cases, bowel movements may not be accompanied by bleeding. In such cases, treatments like Compound Carrageenan Ester Cream or Chlorhexidine Acetate Hemorrhoid Suppositories can be prescribed under medical supervision.

2. Anal Fissure

Anal fissures typically result from chronic constipation, diarrhea, or other conditions that cause tearing of the skin around the anus. Due to localized tissue damage, patients may experience pain, bleeding, and non-bloody bowel movements. Nitroglycerin Ointment or Erythromycin Ointment can be prescribed for treatment.

3. Colorectal Cancer

Colorectal cancer is often linked to genetic factors or poor dietary habits. The growth of tumor cells disrupts the intestinal mucosa, affecting normal bowel function, leading to increased frequency and altered consistency of bowel movements. Patients may also experience abdominal pain and palpable masses. When tumor cells invade blood vessels, they can cause bleeding, although non-bloody bowel movements can also occur. Surgical removal of the tumor, followed by radiation and chemotherapy, may be necessary.

4. Other Causes

Diseases such as ulcerative colitis and Crohn's disease can also cause these symptoms. Ulcerative colitis is often triggered by bacterial or viral infections, while Crohn's disease may be associated with environmental or genetic factors. In cases of ulcerative colitis and Crohn's disease, patients may also experience these symptoms. Treatments like Mesalazine Enteric-coated Tablets or Sulfasalazine Enteric-coated Tablets can be prescribed.

In daily life, it is essential to maintain a balanced diet, focusing on light and healthy foods. Fresh fruits and vegetables like apples and spinach are recommended. Additionally, ensure adequate rest, maintain a healthy sleep schedule, and avoid staying up late.