Tea is usually rich in polyphenols and theophyllines, which are beneficial to the body. However, everything is too much, if you often drink strong tea on a daily basis, excessive tea, the theophylline component in the body will lead to excessive excitement in the human central nervous system, which may cause insomnia, dreaminess, resulting in poor mental health and physical weakness the next day, so it is recommended to drink tea in moderation, not to drink strong tea, and try not to drink tea before bedtime.