Black stools and tingling in the left upper abdomen may be caused by diet, medication or diseases that cause upper gastrointestinal bleeding, etc. If necessary, medication can be applied to stop bleeding and inhibit gastric acid secretion. 1. Dietary or medication factors: the use of animal blood products such as pig’s blood, certain drugs such as bismuth potassium citrate can lead to black stool symptoms, improper diet such as eating unclean or indigestible food can also lead to stomach pain. Usually, it can be gradually relieved after adjusting the diet and stopping the medication. 2. Gastrointestinal bleeding: peptic ulcer, liver cirrhosis and gastrointestinal tumors can cause gastrointestinal bleeding and black stools, which can be accompanied by abdominal pain and other symptoms. Fecal occult blood, liver and kidney function, blood routine and abdominal ultrasound, gastroscopy, etc., and follow the doctor’s instructions to apply hemostasis, acid suppression, mucosal protection or anti-inflammatory drugs, and if necessary, surgical treatment. There are other reasons that can lead to left upper abdominal pain with black stools, it is recommended to go to the regular hospital in time, after clarifying the cause of the disease, under the guidance of the doctor to carry out targeted treatment.