Before the self-test, you need to wash both hands, the right middle finger coated with lubricant, slowly penetrate into the vagina, contract the pelvic floor muscles, and then relax, feel the vagina on the fingers of the feeling of extrusion, the pelvic floor muscle contraction to the maximum degree, remember this time the degree of fingers by the vagina extrusion. According to the squeezing sensation, the muscle strength of the pelvic floor muscle can be determined simply: Grade I can feel the muscle contracting slightly, but the time can not be sustained; Grade II can obviously feel the muscle contraction, which can be maintained for two seconds, completing two contractions. Grade III can obviously feel the muscle contraction, lasting three seconds, can complete three times. Grade Ⅳ for muscle contraction is powerful, can fight against finger pressure, and maintain four seconds time, complete four contractions. At level V the muscle contraction is strong, can resist finger pressure and lasts for more than five seconds, and the pelvic floor muscle contraction can be completed more than five times. If you find that the muscle strength is lower than grade III or equal to grade III, you may have pelvic floor muscle relaxation and need to follow the doctor’s instructions for pelvic floor muscle training, and seek medical advice as soon as possible if you feel unwell.