What should be done first for suspected hyperglycemia in a conscious patient?

In a situation involving suspected hyperglycemia in a conscious patient, the immediate step should be to test blood glucose levels. This action is crucial because it confirms the diagnosis of hyperglycemia and provides a clear measurement of the patient's current blood glucose level.

Knowing the exact level of glucose in the blood is necessary to determine the appropriate subsequent interventions. For instance, if the blood glucose is significantly elevated, the healthcare provider can then make an informed decision regarding treatment options such as administering insulin or recommending lifestyle changes, including hydration.

Without testing the blood glucose first, any treatment rendered (like administering insulin or encouraging water intake) might be inappropriate or insufficient, given that other factors could be contributing to the patient's symptoms. Thus, establishing a baseline blood glucose allows for targeted and effective management of the patient's condition.