Swimming is very tiring Maybe you are too tired to sleep after swimming. Just exercise properly and don't be too tired. You can drink milk before going to bed every night, and it is better to add cookies or bread and other desserts. Relax, listen to music to ease your mood, and do something you like to reduce depression. The songs Soul, Jasmine Saxophone and Autumn Whispering are all pure music. Nice lullaby. Usually eat more vegetables: lotus root, tomato, carrot and spinach. Matters needing attention: First, arrange the work and rest time reasonably, don't sleep during the day and exercise more. Second, don't think too much about work and study or unhappy things during the day, relax and listen to music, and don't be so upset. Third, hot feet before going to bed, the water temperature is 42-45 degrees Celsius. Massage your feet (or rub them yourself). Fourth, don't skip meals and don't overeat. Fifth, the posture of sleeping, sleeping on your side is best to the right. Sixth, you can drink a glass of milk before going to bed to calm your nerves. Keep the room not too stuffy. If you don't feel well, you should see a doctor. Note: If you suffer from insomnia for a long time, I suggest you go to the hospital for examination, and the doctor will prescribe medicine for you. Qiqi's answer, I wish you health and happiness, and hope to help you.