Diabetes can significantly impact your energy levels. When your blood sugar is too high or too low, it can lead to feelings of fatigue and weakness. This is because your body isn't able to use glucose effectively for energy. High blood sugar can also lead to dehydration, which contributes further to tiredness. On the other hand, low blood sugar levels can cause sudden energy drops, making you feel shaky or dizzy. It's essential to monitor your blood sugar levels regularly and maintain a balanced diet to help stabilize your energy throughout the day. If you're experiencing consistent fatigue, speak with your GP for advice tailored to your situation.