Question
I have a separated shoulder.  Phys therapy is using
ultra sound on it.  Are these sound waves completely safe?
Any kind of other results, like cancer?
 (sometimes I get concerned about rays, frequency sound
waves, etc.) )    Cancer or carcinogen?   Any danger?
    Thanks     Dick

Answer
There is no danger using ultrasound. No cancer no radiation to worry about.now is it effective would be my question. You need stretching soft tissue, and resistance exercises maybe ice. Ultrasound is minor importance not major. Get the most get active therapy.  Dr.brian