Without going into details of what this dentist
has diagnosed,..I can see that your jaws tend to tighten when you take cold
food,..There are various reasosn which cause this,... One of these could be stress
,..and cold food is a stimulus for this to happen,.. Do u live a stressful life,..I mean odd job hours,...and do have pain in the jaws,..when u get up in the morning,..which could be a sign of grinding your teeth in the night,...which again could be a sign of stress Jaw muscle spasms can also be caused by badly aligned teeth,.. Since the Dentist u saw has not said anything about ur teeth alignment,..tht cannot be a problem,... So,..the most probable case could be stress,... so what I would suggest is tht u chill out for some me,...avoid the triggers of this episode,..which is cold food,..for sometime,.. Maybe 4-5 weeks,.. Things should smoothen it,...