Is it serious if there are 15-20 red blood cells in the stool?

The presence of 15-20 red blood cells per microliter (μL) or high power field (HPF) in stool is not normal and requires comprehensive evaluation based on specific circumstances. Generally, the normal value for red blood cells in stool should be less than 3 per μL or HPF. Therefore, a result of 15-20 red blood cells/μL or HPF indicates an increased number of red blood cells, potentially suggesting gastrointestinal bleeding or other intestinal problems. The severity depends on multiple factors, including the underlying cause of the elevated red blood cell count, the patient's clinical symptoms, and whether other abnormal indicators are present. If the elevation is occasional and no other discomfort symptoms exist, it may not be serious. However, further examinations are still necessary to determine the underlying cause. Gastrointestinal bleeding could be a transient phenomenon caused by food intake, or it could indicate an acute episode of chronic diseases such as gastric ulcers or duodenal ulcers. Additionally, hemorrhoids, anal fissures, or long-term constipation may cause local capillary rupture and bleeding. Therefore, it is recommended that the patient seek timely medical attention and undergo further examinations such as electronic gastroscopy or colonoscopy to identify the exact cause and receive appropriate treatment. Meanwhile, patients should also pay attention to maintaining a healthy diet, avoiding spicy and greasy foods, ensuring regular bowel movements, and engaging in appropriate physical exercise to enhance immune function.