There are a few possible reasons why night mode may hurt your eyes. One reason may be that the brightness of your screen is set too high. Night mode typically makes the colors on your screen more muted, which can help reduce the strain on your eyes. However, if the brightness is set too high, it can actually cause more strain. Another reason may be that you are looking at your screen for too long without taking a break. It is important to take breaks often when using electronic devices, as this can help reduce eye strain. Finally, it is possible that you may be sensitive to the blue light that is emitted from electronic screens. Blue light can cause eye fatigue and may make it more difficult to fall asleep at night. If you think that blue light may be causing your symptoms, you can try wearing blue light blocking glasses or using an app that filters out blue light.