Feeling nausea and regurgitation after quitting smoking may be caused by psychological factors, withdrawal symptoms and other factors. 1. Psychological factors: there may be excessive tension caused by the decompression of nausea, regurgitation and other situations, mainly due to the withdrawal of the body will feel uncomfortable, induced by the neurological symptoms, no cigarettes to stimulate the nervous system, which in turn causes the phenomenon of nervousness, this situation does not require special treatment, distraction of their attention, slowly disappears. 2. Withdrawal symptoms: mainly due to long-term smoking will form a dependence on tobacco, and quit smoking will appear to crave the state of smoking, so there are withdrawal symptoms, common nausea, discomfort, fatigue, irritability and other symptoms, generally do not need special treatment, after a week or two will disappear on their own. If the situation is serious, it is recommended to go to the hospital for examination.