If diabetic patients experience nausea and vomiting, they must be highly alert to the following diseases: First, diabetic cerebrovascular lesions, which is one of the very common diabetic macrovascular lesions. In the case of a very typical hemorrhagic stroke, also known as cerebral hemorrhage, the patient will experience increased intracranial pressure, resulting in nausea and vomiting, often accompanied by pain, which is mainly a headache. Second, diabetic autonomic neuropathy, if the autonomic neuropathy involves the stomach, it will form gastroparesis, the patient’s gastrointestinal tract function will be significantly disturbed, which leads to nausea and vomiting. Third, diabetic cardiovascular disease, because patients with cardiovascular disease, whether it is heart failure, or coronary artery disease, angina pectoris, may cause nausea and vomiting, especially in patients with heart failure, because there is significant failure of the entire right heart system, which will lead to significant edema in the gastrointestinal tract, which will also cause nausea and vomiting in this case.