Thinning of the stool with stabbing pain in the lower left abdomen may indicate the presence of colon polyps or colon cancer.
Pain in the lower left abdomen is often indicative of a lesion in the descending or sigmoid colon, and thinning of the stool is closely related to intestinal hyperplasia. Due to the narrowing of the intestinal lumen, the stool will be squeezed and deformed when it passes through, resulting in thinning and lengthening of the stool.
1. If the lower left abdominal pain and thinning of stools are accompanied by intermittent blood in the stools and changes in bowel habits, it is possible to consider the presence of colonic polyps. The polyp may break and bleed due to fecal friction, and the bleeding is often in the form of fresh blood in the stool because it is near the anus. At the same time, colon polyps can induce inflammation and irritate the intestinal tract, so they are often accompanied by changes in bowel habits.
2. If the left lower abdominal pain and thinning of stools are accompanied by nausea, vomiting, anemia, and weight loss, consider the possibility of colon cancer. Tumor growth consumes a lot of energy, so it often manifests as digestive discomfort with systemic symptoms.
There may be other reasons for abdominal pain and change in stool pattern, and it is recommended to seek further treatment at a medical institution if you experience any of the above discomforts.