When it comes to the breath detector, everyone will think of the thing used by the traffic police to check drinking and driving. For those who drink and drive, they will lose their temper when they see the breath detector. In fact, the gas exhaled by the human body has many characteristics. It can not only detect alcohol, but also reflect the health of the human body and detect some diseases. This breath detector introduced in this article can detect breast cancer, diabetes, lung cancer, Parkinson's disease, asthma, schizophrenia, kidney and liver failure and other diseases.