Cholestasis is an imaging diagnosis, and most gallbladder stones can present early as cholestasis followed by the formation of bile sludge and stones. There is a relationship between this and a long history of skipping breakfast and not living a regular life. Cholestasis patients need to do the following laboratory tests: blood white blood cell count is obviously elevated, urinary triple bile abnormality, blood bilirubin is elevated, liver function abnormality (such as ALT, AST, r-GT, ALP, etc. are elevated to varying degrees). ultrasound, CT examination can be seen in the gallbladder is enlarged, bile ducts are dilated and stones, ERCP, PTC examination can be clearer to show the lesions in the bile ducts within and outside of the liver. You should pay attention to check the function of the liver and gallbladder, check the blood, urine, and see if there is any abnormal diarrhea. Blood test: Blood test is the most general and basic blood test, which refers to “the test that determines the human body’s anemia, cholesterol, diabetes, various infections, kidney function, calcium, liver function, blood disorders and physical abnormalities through blood analysis. It is one of the most common laboratory tests performed in hospitals. Blood tests should be ordered by a physician, who uses the results to clarify or support a diagnosis, to monitor or decide on means of treatment, and to screen for undetermined conditions. Urine tests: These include routine urinalysis, detection of formed elements in urine (e.g., urine red blood cells, white blood cells, etc.), quantitative determination of protein content, and measurement of urinary enzymes. Urine examination has very important value for clinical diagnosis, judging the efficacy and prognosis. Biliary ultrasound examination: ultrasound is a kind of ultrasound examination, is a kind of non-surgical diagnostic examination, is an emerging discipline, has become an indispensable diagnostic method in modern clinical medicine. Biliary CT examination: biliary ct examination is a method of biliary examination through ct. “T”-shaped tube cholangiography: it is a common X-ray examination method to check the bile duct after surgery. This examination method is easy to operate, safe, excellent contrast, all patients with “T”-shaped tube drainage can apply to this examination method. An iodine allergy test should be performed before the examination, and the test is negative before the examination. The examination is usually performed in the radiology department, the patient should lie down, under strict sterilization, the contrast agent is slowly injected into the bile duct through the “T” tube. Under the X-ray fluorescence screen, the filling of the bile duct can be seen, whether there is any lesion, and whether the contrast agent enters the duodenum, etc. If the contrast is satisfactory, a picture can be taken.