Tests for intestinal flora include fecal examination, endoscopy, blood test, C13 breath test and so on. 1. Fecal examination: If you want to check the intestinal flora, you need to do fecal occult blood test, fecal smear test, etc. Generally speaking, fecal occult blood test can determine the patient’s gastrointestinal bleeding. Generally speaking, fecal occult blood test can determine whether the patient has gastrointestinal bleeding. The direct stool smear test can check the bacteria, fungi, type and number of flora in the stool. 2. Endoscopy: For those who want to check the intestinal flora, they can undergo colonoscopy, gastroscopy and other tests, which can check the condition of the digestive tract. If patients do endoscopy to find out whether there are ulcers and space-occupying lesions in the intestinal mucosa, and if necessary, take tissues for biopsy under endoscopy, which is helpful to determine the overall condition of the patient. 3. Blood test: For patients suspected of having intestinal dysbiosis, it is also necessary to do blood routine, blood electrolytes, liver and kidney function tests, etc. These tests can also help diagnose or identify intestinal dysbiosis. 4. C13 breath test: to detect whether the patient has Helicobacter pylori infection. For people who suspect abnormal intestinal flora, it is recommended that they seek medical treatment in time, and the doctor will choose the appropriate test according to their condition.