Clinical symptoms in male patients with diabetes mellitus, depending on the type of diabetes, are mainly seen in the following conditions: 1. Male patients with type 1 diabetes mellitus often present with a more rapid onset, with typical polyhydramnios, polyuria and polyphagia, accompanied by weight loss. Some patients have diabetic ketoacidosis, nausea, vomiting, panic attacks and chest tightness as the first manifestations. 2. In male patients with type 2 diabetes, the patient has an early history of diabetes, which is not easily detected and has no obvious symptoms in the early stage. With the rise of blood sugar, symptoms such as excessive drinking, polyuria, polyphagia, fatigue, weight loss, accompanied by paroxysmal blurred vision, etc. may gradually appear. Some patients have already had numbness of the limbs, blurred vision and vision loss as the reason for consultation. For male diabetic patients, prolonged poor blood sugar control can cause plant nerve dysfunction, which can lead to decreased sexual function, and some patients visit the clinic because of decreased sexual function and find elevated blood sugar.