There are individual differences in the duration of withdrawal reactions after quitting smoking, but generally within 3 months, most quitters’ withdrawal symptoms can gradually disappear. As the brain nervous system of smokers is stimulated by nicotine, dependence and addiction will develop, and the sudden lack of nicotine in the body will lead to endocrine and circulatory system disorders, and more common symptoms such as irritability, anger, distraction, panic, inability to concentrate, and even anxiety, as well as nausea, vomiting, loss of appetite, diarrhea, and abdominal pain. The longer you smoke and the more addicted you are to smoking, the more likely you are to experience these symptoms when you quit, which may lead to failure to quit. However, if you can persist in quitting for 3 months, the above withdrawal symptoms will usually disappear gradually. If you experience withdrawal reactions during the process of quitting smoking, you must hold on and not give up halfway. In serious cases, you can go to the psychology department of a regular hospital, and under the guidance of a professional doctor, you can get through the discomfort of withdrawal reactions, quit smoking completely, and protect your health and the health of others.