The vibrator warning spoken about in the original writup here is a warning that is on all
sexual vibrators in the
United States. The warning in question states "Do not use on swollen areas or on unexplained calf pain.".
The reason for this is very simple. Rarely, the cause of such ailments can be a lodged blood clot (aka embolus). The use of a vibrator has the potential to free the blood clot and allow it to travel in the blood stream, and can cause more serious problems (people have died from such blood clots) .