The precautions before the physical examination include reasonable diet, good personal hygiene, fasting examination, not wearing metal objects, etc. Pregnant women and women with pregnancy planning should not do radiological programs. 1. Reasonable diet: 3 days before the physical examination, you should eat a light diet, avoiding high-calorie, high-fat food. Do not drink alcohol, strong tea, coffee and other stimulating drinks, so as not to affect the accuracy of the test results. 2. Do a good job of personal hygiene: If there is a urinalysis or gynecological examination and other items, do not douche the vagina or vaginal administration of drugs, and do not have sex, do a good job of personal hygiene and keep your private parts clean 1 day before. If a woman is in her menstrual period, she should wait for her menstruation to be completely clean for 3~7 days before the physical examination. 3. Fasting examination: You should not eat or drink too much 1 day before the physical examination, and you should not eat or drink after 10:00 pm. Do not drink or eat on the day of physical examination. 4. Do not wear metal objects: It is recommended to wear loose and comfortable clothes on the day of physical examination, do not wear clothes and underwear with metal objects, do not wear make-up and jewelry. It is recommended to have a good rest before the physical examination, ensure enough sleep and avoid strenuous exercise.