There maybe several reasons. One could be a cracked tooth from decay or ill fitting crown. Another could be that person may be clenching or grinding at night causing the tooth/bone to be “bruised”.

Colds and viruses can make many parts of your body feel terrible. From a throbbing head to a sour stomach, you may be deluged with discomfort. While this isn't a shock -- you're sick, after all -- you ...