I get so stressed, so I chew gum. How does chewing gum affect your jaw?

Muscle fatigue. Jaw muscles are powerful. Any muscle in the body can become sore, or cramped, or strained with overuse.
Mechanical. Just wearing out your jaw; can get arthritis is in the jaw from this. Try this alternative instead. Take oils of peppermint, citrus and lavender combined and breath them from hands as 3sec in thru nose, hold for 5 sec and out thru mouth for 8 sec; repeat 10 times. Lavender works as well as Xanax (alprazolam) with no side effects and this won't wear out your jaw. www.medac4u.com.