First of all, the subject should tell the doctor the purpose of his or her examination, especially if there is any recent discomfort, because this is the breakthrough we need to pay further close attention to. For example, if you have epigastric pain or belching, your doctor may recommend that you have a gastrointestinal test such as H. pylori. If you have panic attacks, fear of heat, or weight loss, your doctor may recommend a thyroid test. If you have chest tightness or breathlessness, you may be recommended to have a heart and lung test. Those with decreased vision and blurred vision should focus on eye examinations. Secondly, basic examinations are indispensable, which include some simple and economical examinations that can reflect the general condition of the body, such as blood pressure, heart rate, heart rhythm, pulse, and so on. For example, from the simple pulse we can see whether the patient has tachycardia, bradycardia, arrhythmia, etc., which can indirectly understand the contraction function of the heart, and even the closure of the heart valves. Often people do not pay attention to the stool examination, thinking that it is troublesome and unnecessary. In fact, we can get a lot of information from stool, such as intestinal inflammation caused by various reasons, which can lead to intestinal mucosa congestion and edema, local leukocyte aggregation, and increased tissue permeability, resulting in the appearance of leukocytes in stool. In the case of intestinal parasitosis, a higher number of eosinophils can be seen. This reminds us to pay attention to clean dietary hygiene to avoid the spread of bacteria. For example, intestinal polyps and intestinal tumors can cause a small amount of bleeding, which manifests itself as asymptomatic but positive fecal occult blood. Recently, scientists have also analyzed the composition of stool bacteria in order to predict the presence of metabolic diseases. Choose a physical examination based on age. Young children, older adults, and pregnant women. Young children focus mainly on growth and development, such as height, weight, intelligence, and visual color vision. Mothers are often able to inform how they differ from children of the same age. Additional physical examinations such as auscultation of the heart can help detect the presence of congenital heart disease. Older adults should be screened for chronic diseases such as hypertension, diabetes, coronary heart disease, chronic bronchitis, osteoporosis, tumors, depression, falls, malnutrition, dementia, etc. Select medical checkups according to gender. Postmenopausal women are prone to urinary incontinence, menopausal syndrome, osteoporosis, coronary heart disease, etc. According to the nature of work to choose medical examination items. Chemical plants and barber stores should pay attention to the presence of heavy metal poisoning, blood system diseases, etc. Teachers, nurses, restaurant waiters, etc. should pay attention to varicose veins.