It's usually harmful. Even though e-cigarettes do not contain nicotine, they can still cause potentially life-threatening damage to lung function and increase the risk of asthma in offspring. Asthma cannot be cured, and an asthma attack can be life-threatening if not well controlled. E-cigarette use

Pay attention to 7 points to solve the problem.1. Pay attention to the angle of use, keep the mouthpiece upwards, and the stem of the cigarette is inclined downward. If the mouthpiece is down and the stem is upward when smoking, the e-liquid will naturally flow down into your mouth due to gravity. D

About 5%.We all know that e-cigarette liquid contains nicotine, because to achieve the effect of cigarettes, so nicotine is a relatively necessary thing, but people need to know the content of nicotine, too high content may have an impact on health.The content of nicotine in e-cigarettes is about 5%