Smoking Cessation Syndrome, also known as Nicotine Withdrawal Syndrome, is a condition in which regular smokers experience a range of discomforts such as irritability, dizziness and headaches, insomnia, coughing, excessive sweating, and weight gain when they suddenly quit smoking. Smoking cessation syndrome occurs as a result of the rapid decline in nicotine intake by smokers during the cessation period, which fails to reach the level required by the brain. Smoking cessation syndrome can occur during the process of quitting, whether or not the smoker is taking medication, and the older the smoker, the more likely he or she is to experience withdrawal syndrome when quitting. When a smoker gives up smoking, the body begins a process of reorganization and repair as a way of removing the damage and residue left behind by the body after a long period of smoking. Therefore, it is normal to experience withdrawal syndrome, which requires perseverance; if the discomfort is unbearable, you need to consult a doctor.