If ultrasound suggests no abnormality, but patients with obvious symptoms should continue to improve other related examinations if necessary, just consult a clinician. Because: 1, ultrasound examination mainly observes morphological changes, many diseases early organ morphology no obvious changes (such as various kidney disease early kidney size and morphology is not abnormal, early pancreatitis ultrasound no specific performance, etc.). 2, ultrasound is not a panacea (lung, bone, stomach, intestines and other organs examination is particularly limited, although now gastrointestinal ultrasonography has been widely carried out, musculoskeletal ultrasound specialty has also developed, but by the examination conditions and physician experience restrictions, these parts of the examination is still best to take other imaging examinations that have been very mature). Especially in emergency examinations, the examination of the stomach and intestines is limited to suggesting or excluding perforation (indirect signs such as free gas under the diaphragm and fluid in the peritoneal cavity), intestinal obstruction, intussusception, relatively large gastrointestinal tumors (the examination effect is definitely not comparable to gastroscopy and enteroscopy), and observation of gastric filling and emptying. Why did the ultrasound not detect my painful area? In some cases, the site of pain is not the cause, such as angina pectoris radiating to the subxiphoid process, renal colic radiating to the scrotum, or cholecystitis radiating to the right back. When the clinician considers the diagnosis of the disease, he or she must also consider the differential diagnosis to rule out other causes of the same symptoms, so it is possible that the site on the examination list is not the site of the patient’s pain.