It is possible to have no symptoms on the second day of quitting smoking, or you may experience symptoms in the digestive, respiratory, and nervous systems. Cigarettes contain nicotine, tar and other ingredients. Long-term smoking creates dependence, and if you quit smoking suddenly, it may lead to withdrawal symptoms. According to patients who quit smoking, the day after quitting smoking, there may be no symptoms, or there may be dry mouth, loss of appetite, bloating and other gastrointestinal symptoms; respiratory symptoms, such as coughing, coughing up phlegm, and a feeling of a foreign body in the throat; and neurological symptoms, such as anxiety, nervousness, irritability, and lack of concentration. The severity of the symptoms depends on the age of the smoker, the number of cigarettes smoked per day, and willpower. If you experience discomfort the day after you quit smoking, you can drink more water to boost your metabolism, and if your symptoms are severe, you need to go to the hospital for regular medical care.