You can choose to drink a glass of milk before going to bed: If you often have insomnia before going to bed, you can drink a glass of milk about ten minutes before going to bed, which will help you fall asleep quickly. If you like the taste very much, you can use aromatherapy essential oil, add essential oil and drink milk, which will be better.
Also, don't eat those undigested things before going to bed: here is not an hour before going to bed, but a few hours. It is best not to eat indigestible and greasy food during this time, and eat less if you want to eat. If you eat too much, the stomach needs to do more work, which will make the stomach bear too much and lead to insomnia.
Secondly, bubble bath can also recuperate insomnia. If you often suffer from insomnia, consider taking a hot bath about 30 minutes before going to bed. You can listen to light music when taking a bath, as long as it calms people down. Be sure not to play fast-paced songs, otherwise you will be very excited, and you may be unable to sleep because of excitement. Bathing and light music can make you feel more comfortable and help you sleep.
I hope my answer can help your friend.