In general, thymoma is not considered a serious disease, and it is a less malignant tumor with a good prognosis if treated at an early stage. It is recommended that these patients should be treated as early as possible and followed up regularly. Thymoma is mostly found during physical examination, and patients often suffer from shortness of breath, cough and other symptoms due to the pressure on normal tissues. Generally speaking, most of thymomas are benign tumors without peritumoral infiltration and distant metastasis, which can be removed by surgery and followed up regularly with good prognosis. A small portion of thymoma has the risk of malignancy and recurrence, therefore, surgical resection and treatment should be accompanied by regular radiotherapy, immunotherapy or biotherapy according to the patient’s condition, which will generally give better treatment results and the survival time of patients will be longer than that of other types of tumors. To summarize, patients should go to the hospital for treatment as early as possible to avoid delaying their condition.