E-cigarette oil is harmful to the human body. 1. E-cigarettes contain nicotine and other harmful ingredients just like regular cigarettes, which are inhaled after turning nicotine into vapor. Inhaling the tiny particles of e-cigarettes can lead to respiratory tract damage, and over time chronic obstructive pulmonary disease (COPD) occurs, causing lung infections. 2. And e-cigarettes for cardiovascular disease is also harmful, especially combined with coronary heart disease, cerebral embolism, cerebral infarction history of the population, will aggravate the incidence of cerebrovascular disease, aggravate acute myocardial infarction acute cerebral embolism disease incidence. So electronic cigarettes are also potentially harmful to the body, if you accidentally absorb a small amount of tobacco oil, you can use mouthwash to rinse your mouth and drink more water to expel the body in time.