There are many diseases that can be detected by blood sampling, but it can only be used as an auxiliary means and needs to be combined with other tests to confirm the diagnosis of a certain disease. There are many abnormalities that can be detected through different blood tests, such as routine blood tests for anemia, liver function tests for liver damage, and so on. 1. Blood tests can detect anemia, infection, leukemia and other diseases. 2. Liver function test can detect whether there is liver damage and bile duct obstruction. 3. Lipid test can check whether there is high blood fat. 4. Kidney function test can also find out whether there is hyperuricemia, renal insufficiency, renal failure and so on. 5. Electrolyte check can reflect whether there is electrolyte disorder, such as hyperkalemia, hypokalemia, hypernatremia, hyponatremia, hypercalcemia. There are many diseases that can be detected by blood sampling, but it can only be used as an auxiliary means, and it needs to be combined with other tests to confirm the diagnosis of a certain disease.