Symptoms of TMD include:
Pain in the jaw area
Pain, ringing, or stuffiness in the ears
Frequent headaches or neck aches
Clicking or popping sound when the jaw moves
Swelling on the sides of the face
Muscle spasms in the jaw area
A change in the alignment of top and bottom teeth
Locked jaw or limited opening of the mouth
Should you notice any of these symptoms, let your doctor know. Your dentist can help indicate the presence of TMD and create an effective treatment just for you.

There are a few simple steps you can take at home or work to prevent TMD from becoming more severe, or to prevent it from occurring:

Relax your face — remember the rule: "Lips together, teeth apart"
Avoid grinding your teeth
Avoid constant gum chewing
Don't cradle the phone receiver between your head and shoulder — either use a headset or hold the receiver in your hand
Chew food evenly on both sides of your mouth
Do not sit with your chin rested on your hand
Practice good posture — keep your head up, back straight, and shoulders squared