Your condition is called post-surgical TRISMUS
. This generally is a complication after impactions & extensive bone removal. It shd last for max 3-4 weeks till the healing is complete. The open wound exposes the jaw bone & also the root of the adjacent tooth,hence the sensitivity to cold
. You need to do the following;
a) Make sure the procedure was properly done: this can be achieved by a post-op X-ray or a 2nd opinion by an oral & maxillo-facial surgeon.
b) Take a muscle-relaxant along with pain medication to unlock the jaw muscles like IBUGESIC-MR.
c) Chew on a sugar-free gum like orbit/wriggley for 15min every 3hrs. This is physiotherapy
for your jaw muscles.
d) Gargle with warm salt water for 5min alternate hourly
Thanks & take care