Short-term starvation blood glucose concentration may be high. When the human body is in the state of starvation, the blood glucose concentration will start to be low slowly, and even the symptom of hypoglycemia may occur. At this time, the body’s self-protection mechanism may be activated, and the glycogen originally stored in the body will be released to increase the concentration of glucose in the blood, and the secretion of glucagon will be increased, and then there will be a reflexive blood glucose increase, so the blood glucose concentration of short-term starvation may be high. Patients may have high blood glucose levels after short-term starvation, but when the body’s glucagon and glycogen are broken down and metabolized, the blood glucose levels will still drop. Normal people or diabetic patients, it is best not to let themselves in a state of starvation, low blood glucose concentration will make the body reflexive blood glucose rise, blood glucose will be high for a while and low for a while, will cause adverse effects. It is recommended that patients with abnormal blood glucose consult a doctor in a timely manner to develop a reasonable treatment plan under the guidance of the doctor.