For long-term smokers, suddenly stop smoking may appear headache, nausea, constipation, diarrhea, decreased heart rate, decreased blood pressure, fatigue, drowsiness, insomnia, easily irritated, difficult to concentrate, anxiety, depression, easily hungry, tend to eat more, like to eat sweets, tobacco addiction dependence, nicotine can cause drug dependence, is that the body must maintain a certain concentration of nicotine mental state In order to elevate, when suddenly stop smoking after the concentration of nicotine in the body decreases, the body will have a withdrawal reaction. In most cases, this reaction peaks within 48 hours and gradually disappears in about six months. The following conditions should be seen in a hospital if the tobacco user becomes concerned about health, after tobacco use a variety of diseases can occur, such as respiratory diseases, circulatory diseases, with strokes, heart attacks, vascular occlusive diseases to various cancers. If you want to quit smoking, your doctor may provide nicotine supplements as well as advice, and you can also gradually appear to quit tobacco dependence.