Color ultrasound, i.e. color Doppler ultrasound, is the first choice for cholecystitis and can usually play a diagnostic role. During ultrasound examination of cholecystitis, acute cholecystitis can be seen as signs of gallbladder enlargement, thickening of the gallbladder wall, and oozing around the gallbladder; chronic cholecystitis can be seen as signs of gallbladder shrinkage, thickening of the wall of the gallbladder, and poor gallbladder contraction; cholecystitis is mostly due to gallbladder stones, and the ultrasound can also detect images of the stones in the gallbladder. Therefore, when cholecystitis exists, ultrasound can usually detect it, and has the advantages of non-invasive and affordable. However, for some people with more abdominal fat, there is attenuation of ultrasound, which affects the clarity of ultrasound. In this case, CT and MRI can be used for diagnosis. Specific diagnosis should be carried out by a specialized doctor, and it is recommended to follow the doctor’s instructions for the examination.