Frequent hypoglycemia in type 1 diabetes mellitus may be related to the patient’s irregular diet, inappropriate exercise, and inappropriate medication regimen, etc. Consultation with a doctor is recommended. 1. Diet: Patients with irregular diet, with more or less food, may be prone to recurrent hypoglycemia. 2. Exercise: A sudden increase in the amount of exercise without a change in diet and treatment regimen may lead to recurrent hypoglycemia. 3. Medication regimen: Type 1 diabetes mellitus is an absolute insulin deficiency and is treated with insulin. If the insulin dosage is too much, or the injection method is wrong, the injection dose is not accurate, etc. may lead to frequent hypoglycemia. If frequent hypoglycemia occurs in type 1 diabetes mellitus, it is necessary to pay attention to it. It is recommended to go to an endocrine specialist for consultation, and individualized treatment plan will be formulated according to the situation of blood glucose monitoring.