Is it possible to get Botox for TMJ pain or tight muscles?

Yes, Botox works to relax all muscles. Injecting the masseter and temporalis muscles should help with TMJ, headaches, teeth clenching.
The cost will vary from region to region and the number of units injected into the muscles.

The botox can be injected in the masseter and temporalis muscles to relax them and have less discomfort, this is very helpful also for the treatment of migraines from that reason or for people who clinch their teeth during the night. The amount of units is variable, it can be from 30 to 60 units. The cost depends on how the physician charges for that particular procedure and the city. It can start around $300.00 in average