About 10-15% of adults have temporomandibular disorder, a condition connected with TMJ – here’s what to know

It seems like all of my friends are having jaw pain.

As we trudged deeper into our 30s, I was prepared to hear about bad backs and tricky knees. But the mouth stuff was unexpected. Some were grinding their teeth at night and needed mouthguards. Others had doctors inject botulinum toxin, commonly referred to as Botox, into aching jaws. And we are all now extremely familiar with a new body part: the TMJ, or temporomandibular joint, which connects the jawbone to the skull.