Drinking oolong tea can replenish nutrients and also wake up the brain and refresh the mind, usually there is no harm, but excessive consumption may cause insomnia, so it is recommended to drink in moderation. Oolong tea is a common tea in daily life, containing amino acids, polyphenols, flavonoids, potassium, iron, sodium and other nutrients, appetizing and unctuous, after drinking can replenish the required nutrients, and at the same time replenish the body’s water needs. Oolong tea also contains caffeine, which can stimulate the cerebral cortex to produce excitement, so drinking can wake up and refreshment, but if you drink too much, it may cause insomnia, especially insomnia may be aggravated by the crowd drinking insomnia. Some people also have excessive urination, panic and other discomforts. So although drinking oolong tea has many benefits, but it is recommended to drink in moderation, so as not to affect sleep.