Sleeplessness after drinking milk tea is usually due to the fact that milk tea is rich in tea polyphenols, which can make the central neurotransmitters overexcited and sensitive, thus leading to excessive and abnormal discharge of brain cells, stimulating the central nerve cells in the cerebral cortex, causing excessive excitement, which can lead to sleeplessness due to excessive discharge and overexcitation of the nervous system and nerve endings. Drinking milk tea for a long time will also cause neurological dysfunction and neurological disorders, which will greatly shorten the deep sleep phase and increase the light sleep phase, and also cause insomnia, dreaminess, fatigue and excessive physical fatigue. In addition, milk tea is also rich in certain caffeine, which is a substance that can lead to excessive excitement of neurotransmitters, so after drinking milk tea will lead to sleeplessness.