Drinking milk tea before going to bed will cause insomnia. Because the milk and tea after boiling, especially after the tea is boiled for a long time will produce a very large amount of caffeine, caffeine content is equivalent to drinking 2-3 cups of coffee. Caffeine has a refreshing effect, so if you drink milk tea before going to bed is equivalent to drinking 2-3 cups of coffee, it is easy to cause insomnia, so it is recommended to drink a little bit in the morning or at noon in moderation. It can refresh the brain, improve the mood of the role, but also improve work efficiency, not recommended to drink a lot of milk tea before going to bed so drinking milk tea before going to bed can cause insomnia, because milk tea contains a lot of caffeine.