Why do I have a bad click on one side of my jaw and how can it be fixed?

Sounds like a TMJ ( temporomandibular joint) problem.

TMJ – Tempromandibular joint disorder. There are a lot of factors involved, but teeth grinding or clenching can definitely play a part. Talk to a dentist about it, there are a lot of strategies to help with it, from simple exercises and mouthpieces to more dramatic approaches when necessary. I have something like this, but it never locks up or hurts anymore, just clicks. I now have a bad habit of repeatedly clicking my jaw periodically.

TMJ or if you are in your late teens/early 20s it could be your wisdom teeth coming in at an angle.

In your case, it does sound like TMJ.

My husband had a “clicky” jaw whenever he chewed, sometimes when he talked or opened his mouth wide. I don’t know how long it lasted, as he had it when we met. Shortly after we got married (or maybe before, I don’t remember), he went to the chiropractor for an adjustment. No click since. His, however, didn’t hurt him.