If it is short-term, it may be a food problem before going to bed.
In the long run, it may be "sleeping upside down"
1, avoid spicy food before going to bed.
2, avoid a lot of exercise before going to bed.
3, endure not sleeping even if you are sleepy during the day.
4. I really can't sleep and drink some Gynostemma pentaphyllum. It contains saponin and can promote sleep.