The word "water injection" comes from a behavior in real life, that is, injecting water or liquid into a container. In some industries, such as dance and sports, this word is used to describe a person's performance has been enhanced. Specifically, in some performance activities, in order to get better results, some drugs will be injected into the performers to make them in better physical condition and be able to face challenges calmly.

The incident of injecting water into ears not only happened in modern times, but also had similar cases in history. For example, in ancient Greece, some participants in sports competitions used equipment similar to modern weightlifting equipment to practice weightlifting. In this process, they may inject some liquid into the external auditory canal to get a better sense of balance or a more stable body state.

Although water injection can enhance the performer's performance, it is also harmful. Water injection may cause adverse reactions such as increased heart rate, loss of balance and dizziness. Moreover, the behavior of water injection may deepen people's dependence on drugs or instruments, thus affecting their health and performance quality. Therefore, injecting water into the ear should be regarded as a dangerous behavior, so we should be vigilant and take precautions.