What should you do if someone is experiencing hyperglycemia?

In the case of someone experiencing hyperglycemia, it is crucial to understand that they have too much glucose in their blood and need a way to effectively bring their blood sugar levels down. Administering insulin is typically the principal medical response for individuals who are diagnosed with diabetes and experience hyperglycemia, but it should be done under proper medical guidance.

However, while providing orange juice may help raise blood sugar levels in someone experiencing hypoglycemia (low blood sugar), it is not appropriate in cases of hyperglycemia, where you would want to avoid any additional sources of sugar.

Giving water is generally beneficial for hydration, but it does not specifically target the issue of elevated blood glucose levels. Likewise, encouraging exercise can be beneficial, but in certain cases, especially if blood sugar levels are very high, exercise might not be advisable until insulin is administered or blood glucose is closely monitored.

Therefore, the most appropriate action when dealing with someone experiencing hyperglycemia is to take steps that would involve monitoring and possibly administering insulin based on their individual health plan and guidance from medical professionals. Note that the ideal step should always be implemented in conjunction with healthcare advice.