There is no effect of urination and defecation on the physical examination, but it is recommended that temporarily do not urinate and defecate. The reasons are as follows: 1, the physical examination will check the urine and feces, if the urine and feces first solve and then go to the physical examination, then the urine in the morning can still be solved, the stool in the morning, so the examination can not be done; 2, ultrasound in the bladder, gynecological uterine adnexa, it is recommended to keep the bladder full, that is, up urine, up urine and then do the ultrasound examination, can make the ultrasound look at these parts more clearly, easier to find the problem. So go for ultrasound first in the morning without urination, after doing ultrasound, and then urinate just when the urine examination is done, it is not recommended to do the physical examination after urination and defecation at home.