The rapid loss of weight after cerebral infarction may be caused by the following reasons: for example, patients with large cerebral infarction and brainstem infarction can generally develop swallowing dysfunction, such as dysphagia and choking on water, and patients with dysphagia are generally prone to aspiration or choking on solid food, which can lead to death, and choking on water can easily cause aspiration pneumonia, both of which can cause patients to have difficulty eating Both of them can cause difficulty in eating and lead to wasting of the patient. If it is difficult to correct the problem within a short period of time, the patient should be given a gastric tube, a retained gastric tube, and a nasal diet to supplement the essential nutrients and prevent malnutrition from leading to wasting. Patients with massive cerebral infarction often have combined stress ulcers and upper gastrointestinal bleeding. If a patient has upper gastrointestinal bleeding, fasting is usually given, which may also cause the patient to lose weight. It may also be due to the fact that patients with massive cerebral infarction are generally given cranial pressure-lowering treatments, such as mannitol and tachyphylaxis, which have a dehydrating effect along with the treatment and may also cause the patient to lose weight significantly.