E-cigarettes, also known as vapes, are electronic devices that heat a liquid and produce an aerosol. Most e-cigarettes contain nicotine, which is highly addictive. Nicotine can harm brain development in children and teenagers. Vaping can also cause tooth decay and long-term lung damage. Additionally, defective e-cigarette batteries have caused fires and explosions that have resulted in injuries. Children have been poisoned from swallowing or absorbing e-cigarette liquid. The law prohibits vaping under age 18 due to health risks from nicotine.