The main thing is to observe the situation of blood glucose level when the insulin dose is overdosed. If there is panic and sweating, it may be hypoglycemia, it is better if you can measure your own blood glucose, and if you find a tendency of hypoglycemia, you need to eat or use glucose intravenously, and it is recommended to consult your doctor. 1. Closely monitor blood glucose and choose the intervals for monitoring blood glucose according to the type and dose of insulin injected. If the patient injects fast-acting insulin such as menthyl insulin, he/she should start to monitor the blood glucose in 10~20 minutes, and if the blood glucose is obviously low, he/she needs to correct it in time, and monitor the blood glucose for about 3~5 hours until the blood glucose level is reasonably stable. If the patient is injecting long-acting insulin, the monitoring time should be longer. 2. If the hypoglycemia is caused by too much insulin injection, after the correction of blood glucose, it is also necessary to further assess the presence of cardiovascular and cerebrovascular diseases, such as the presence of cerebral infarction, coronary heart disease and other acute events. Therefore, if too much insulin is injected, first of all, we should pay attention to monitoring blood glucose to avoid serious hypoglycemia, once serious hypoglycemia occurs, we need to further hospitalization to assess its possible harm.