Diabetic patients who have recently developed numbness in the hands and blurred eyes may be due to complications, such as diabetic peripheral neuropathy and diabetic retinopathy. 1. Diabetic peripheral neuropathy: the triggering factor of neuropathy is poor glycemic control or large fluctuations, hypertension, smoking, obesity and lipid level disorders may also be related to the occurrence of diabetic peripheral neuropathy. Diabetic peripheral neuropathy can be manifested as sensory loss, numbness of hands and feet and other symptoms. 2. Diabetic retinopathy: It is mainly caused by the damage of retinal microvessels due to the continuous elevation of blood glucose. Common risk factors include dyslipidemia, pregnancy, smoking and so on. The patient may develop flying mosquito disease, showing symptoms such as tearing eyes, photophobia and blurred vision. Diabetic patients with numb hands and blurred eyes need to go to the hospital in a timely manner to improve the relevant examinations, identify the causes, and carry out targeted treatment under the guidance of professional doctors.