A foreign body sensation in the vagina after sex with your partner can usually be caused by gynecological infections due to coital stimulation or male circumcision. If the sex time is longer, or friction stimulation is too large, there will still be residual foreign body sensation afterward. This foreign body sensation will soon disappear, do a good job of cleaning the vulva can, do not worry. However, if the woman does not relieve this feeling for a long time or disappear, you can use warm water to rinse the vagina, and then check again. If it is confirmed that there is no foreign body in the vagina, but the foreign body sensation does not disappear, you can go to the hospital to do the appropriate examination to clarify the cause.