After the obstruction caused by the cervical duct of the gallbladder, the water in the gallbladder does not flow, and the accumulated water is like stagnant water in a pool, which can easily cause bacteria to breed and multiply and become infected, thus forming the accumulation of pus in the gallbladder. In the case of gallbladder effusion, the gallbladder gradually enlarges due to the continued secretion of mucus, the wall of the gallbladder becomes thinner, and a clear liquid (so-called “white bile”) accumulates in the gallbladder; while in the case of gallbladder pus, in addition to the enlargement of the gallbladder, the wall of the gallbladder shows chronic inflammatory changes, and the pus accumulated is generally a thinner purulent liquid. Clinical diagnosis can be based on medical history. The bile turns into foul-smelling pus, and then the pressure inside the gallbladder gradually increases, affecting the blood and lymphatic circulation of the mucous membrane of the gallbladder wall, gradually causing ulcers and necrotic lesions on the mucous membrane of the gallbladder wall, and in severe cases, large areas of necrosis and perforation may occur. The diagnosis is made based on the discharge and related means.