Follow-up testing means that doctors regularly learn about the changes in the patient’s condition and guide the patient’s recovery, in order to detect the disease in time, clarify the progress of the disease, and help early treatment. Follow-up testing is a common way of observing diseases in the clinic, especially when the human body finds certain indicators abnormal, but is unable to determine whether or not the disease is present. Because a definitive diagnosis cannot be made, follow-up testing is needed to observe the dynamic changes in the human body, so that changes in the condition can be regularly understood and timely intervention and treatment can be carried out. Through follow-up visits, it is convenient for doctors to follow up and observe the patients and grasp first-hand information about their conditions. Therefore, when the doctor proposes a follow-up visit, the patient should actively cooperate.