In addition to the examination of gallbladder pus based on the history, the diagnosis can also be made based on the discharge. Bile turns into foul-smelling pus, and later the pressure inside the gallbladder gradually increases, which affects the blood and lymph circulation of the mucous membrane of the gallbladder wall and gradually causes ulceration and necrotic foci on the mucous membrane of the gallbladder wall, and in severe cases, large areas of necrosis and perforation may occur. The diagnosis is made by examination based on the discharges and related means. When the mucosa still continuously secretes colorless watery mucus (white bile), gallbladder effusion can be formed; when secondary infection occurs. The examination methods are as follows. 1, routine blood test: in acute cholecystitis, the white blood cell count is mildly increased, and neutrophils are increased. If the white blood cell count is too high, and there is nuclear left shift and toxic particles, then the gallbladder may be necrotic or have complications such as perforation. 2.Duodenal drainage examination: in chronic cholecystitis, if there is increased mucus in the bile; leukocytes are piled up, and the bacterial culture or parasite examination is positive, it is very helpful for diagnosis. In addition, according to T-tube imaging, intravenous cholangiography, oral cholangiography, liver, gallbladder and spleen CT and other auxiliary examinations can help diagnosis.