When undergoing an ultrasound for cholecystitis, fasting is required, but there is no need to hold urine. However, if the examination involves the adnexa of the uterus, bladder, prostate, and other areas, it requires holding urine to perform the test, allowing the prostate, adnexa, etc., to sufficiently distend. This helps in more clearly observing pathological changes. Patients with cholecystitis need to fast before an ultrasound. If food is consumed before the scan, the gallbladder contracts more quickly, making it difficult to accurately identify lesions. Patients with cholecystitis may experience chills, fever, right upper abdominal pain, jaundice, yellowing skin, dark urine, etc. In severe cases, patients may develop septic shock and require active treatment measures.