Why do I get a headache in the afternoon if I don’t take a nap at noon?

Not napping at noon may lead to headaches in the afternoon. This headache is likely related to prolonged visual and mental exertion, and may also be associated with relatively weak physical constitution. Therefore, it is essential to rest for a short period at noon to ensure adequate energy and mental alertness. Additionally, regular physical exercise should be incorporated into daily routines to enhance overall resistance and immunity, while avoiding extended periods of visual and mental strain. These measures can help improve the condition.