Why do you have a headache after a long nap?

Headache after a long nap may be caused by the following reasons: 1, which may be related to sleep time. Sleeping too long or too short can lead to dizziness.

2. Considering the sleeping environment, if the indoor air circulation is not good, it will cause the brain to be in a state of chronic itching, and it will also lead to head fainting.

3, it may be related to sleeping position. If you sleep on your stomach and your neck is pulled, it is easy to compress the vertebral artery, causing dizziness, head sinking, even dizziness, nausea, vomiting and other symptoms.