Generally speaking, nausea and vomiting after radiotherapy for esophageal cancer (esophageal cancer) will be relieved in about 2 weeks, but there are individual differences in the time of symptom relief. The nausea and vomiting relief time after radiotherapy is related to individual’s physical condition and the location of radiotherapy. Generally speaking, the nausea and vomiting will be relieved in about 2 weeks after thoracic and abdominal radiotherapy, while the nausea and vomiting will be relieved after brain radiotherapy in 1 month to half a year. In general, radiotherapy for chest and abdomen will be relieved in about 2 weeks, while radiotherapy for brain may take 1 month to half a year to be gradually relieved. Side effects such as nausea and vomiting caused by radiotherapy for esophageal cancer patients will be relieved in about 2 weeks. In addition, if the patient’s physical condition is relatively poor or sensitive to radiotherapy, the time for nausea and vomiting to be relieved may be relatively longer. If nausea and vomiting occurs after radiotherapy, patients should consult doctor in time and treat the symptoms, pay attention to light diet and do not eat spicy and stimulating food.