Diabetes typically presents with symptoms of polydipsia, polyuria, polyphagia, and weight loss, commonly known as the "three excesses and one deficiency." However, diabetic patients often have accompanying autonomic dysfunctions or peripheral neuropathy, which can also lead to excessive sweating. Clinically, it is observed that some patients might sweat excessively in specific areas. For instance, some might report excessive forehead sweating or localized sweating on certain body parts, or even unilateral sweating. In such cases, it is necessary to consider whether the symptoms might be a complication of diabetes. To diagnose this, one should firstly conduct diagnostic tests for diabetes, such as the oral glucose tolerance test (OGTT), to determine if the blood glucose levels meet the diagnostic criteria for diabetes. Additionally, it is important to perform electromyography to check for any neuropathic complications that might affect nerve conduction velocities. This helps in determining whether excessive sweating is a specific symptom of diabetes. However, not all cases of hyperhidrosis are specific to diabetes; other conditions, such as hyperthyroidism (thyrotoxicosis), can also cause excessive sweating and should be considered.