Normal bowel movement followed by blood in stool

Under normal circumstances, passing stool that starts out normal but is followed by blood may be caused by factors such as hemorrhoids, anal fissures, or ulcerative colitis. Patients can receive symptomatic treatment based on the specific cause. Detailed analysis is as follows:

1. Hemorrhoids

Prolonged sitting may impair blood circulation in the anal area and affect venous return around the anus, leading to hemorrhoids. When hemorrhoids occur, blood vessels inside the anus may become congested, swollen, and rupture, resulting in blood appearing in the stool. It is recommended that patients use medications such as Guantai Ointment or Yunnan Baiyao Hemorrhoid Ointment under medical guidance, and avoid prolonged sitting.

2. Anal Fissure

Excessive straining during defecation may cause tears in the anal canal, leading to anal fissures. During bowel movements, friction or stretching of the fissure may result in bloody stools. It is recommended that patients use medications such as Huazhi Capsules or Maren Pills under medical supervision, and avoid excessive straining during defecation.

3. Ulcerative Colitis

If close relatives have ulcerative colitis, patients may develop the condition due to genetic predisposition. During bowel movements, the colonic mucosa is easily irritated, which may lead to rupture and bleeding, causing blood in the stool. It is recommended that patients use medications such as Methylprednisolone Tablets or Sulfasalazine Enteric-coated Tablets under medical guidance, along with appropriate physical activity to enhance immunity.

In addition to the three causes mentioned above, other conditions such as anal polyps, colon cancer, or anal cancer may also be responsible. Patients are advised to seek timely medical evaluation and treatment.