Gastric retention may be functional gastric retention or organic gastric retention. Functional ones are relatively less serious, while those caused by organic diseases are generally more serious. Functional gastric retention includes idiopathic gastroparesis and secondary gastroparesis, of which the cause of idiopathic gastroparesis is not clear, and may be related to emotional factors, respiratory tract infections, etc., while secondary gastroparesis may be due to upper abdominal surgery, endocrine diseases or neurological diseases, etc., but most of them are not serious. Organic gastric retention is caused by pyloric obstruction, which may be due to congenital hypertrophic pyloric stenosis, gastric sinus cancer, peptic ulcer, etc. It is relatively more serious and often requires surgical treatment. After the occurrence of gastric retention, you should go to the hospital in a timely manner, cooperate with the doctor to do the relevant examination, clarify the cause, and then targeted treatment.