Blood glucose 69mg/dl after conversion is about 3.8mmol/L, fasting blood glucose normal value is 3.9~6.1mmol/L, so if the diabetic patients receiving medication have low fasting blood glucose 3.8mmol/L, it belongs to hypoglycemia. Low fasting blood glucose may be caused by dietary factors, such as too little food; medication factors, such as the use of hypoglycemic drugs overdose; pathologic factors, such as endocrine diseases, chronic diarrhea malabsorption and so on. If the low fasting blood glucose is caused by dietary factors, the low blood glucose can be corrected through daily adjustments. If it is caused by medication or disease factors, it is necessary to correct the dosage of medication under the guidance of the doctor or to treat the original disease, so as to correct the blood glucose. In daily life, both healthy people and patients with high blood glucose should maintain a healthy lifestyle, exercise appropriately, and follow a low-salt, low-fat, and low-sugar diet, which will help maintain stable blood glucose. If abnormal blood glucose value occurs, it is recommended to go to the hospital for consultation.