I had cryotherapy on my foot to try and treat a verruca. I visited the doctors the day after having it as i thought it was infected, told no it wasn't, that night got no sleep what so ever, the pain was awful and I ended up going to a and e at 6am, by 7am I'd lost the feeling in my foot and couldn't move my toes. I wasn't told how bad it could be and have bad the side effect were. I'm still having trouble with the foot now and have been since i had it done in feb 2016 and waiting for a hospital appointment to hopefully see if they can fix the mess. PLEASE make sure you ask lots of questions before going though with it.