Long-term second-hand smoke is extremely harmful to the body, it is likely to cough, chest tightness, panic, memory loss and other symptoms. 1. Cough: Because secondhand smoke contains nicotine and tar, inhalation may stimulate the bronchial mucosa, which leads to coughing, mostly dry cough. 2. Chest tightness, panic: because the nicotine in cigarettes will prompt the endings of the extremities of the vasoconstriction of blood vessels, resulting in rapid heartbeat, blood pressure, and smoke in the carbon monoxide is inhaled into the body, will lead to a lack of oxygen in the body, there will be chest tightness, panic symptoms. 3. Memory loss: Because cigarettes contain tar, nicotine and many other chemicals that are harmful to the body, they can affect the individual’s nervous system and endocrine system, which can lead to symptoms of memory loss. Smoking is harmful to your health, so please try not to smoke, and also try to stay away from secondhand smoke. Long-term inhalation of secondhand smoke can also lead to emphysema and other symptoms. If you feel unwell as a result of inhaling large amounts of secondhand smoke, please seek medical attention as soon as possible.