A follow-up examination is usually required 3 months after the completion of radiotherapy. The time for follow-up after radiotherapy is determined by the hospital, which may vary from hospital to hospital, but most of the hospitals require a follow-up once a month after the completion of radiotherapy, then a second time at 3 months, and a third time at 6 months after the completion of radiotherapy. After radiation therapy is completed, you should have a checkup every 6 months for 2 to 5 years. The purpose of the follow-up after radiation therapy is to determine the effectiveness of the treatment, to understand the condition of the patient, and to observe the side effects of the radiation therapy. After the radiotherapy is finished, you need to follow the doctor’s instructions for regular checkups. If the patient has any discomfort after radiotherapy, he/she should consult the doctor actively to avoid delaying his/her condition. After radiotherapy, patients should take more rest and keep a good mindset.