I Got Botox Injected For TMJ, A Week After My Master Muscle Is In So Much Pain Than Before! Any suggestions?

Botox is a wonderful medicine to ease muscle pain from TMJ.  Often there is little pain after the injection.  It is possible that you have a small bruise from the injection which is causing pain.  This will go away.  You may want to consider using an over the counter pain medication like motrin to help with the pain.  I would also check in with your doctor.  Feel better!

The masseter is a very large muscle and requires a lot of material for the result to be effective so it is not unusual to have some discomfort for a week or so after the injection. it should go away by itself

It is not unusual to have some muscular soreness after Botox injections into the muscles of mastication.  However, severe pain is uncommon, and might herald a small hematoma, especially if you are experiencing this on one side only.  I think you should make a follow up appointment with your treating surgeon.  In the mean time try alternating ice for 15 minutes, followed by moist heat for 15 minutes.  Best of luck.

This not normal at a week. It could be due to many reasons and a clinical examination by your dermatologist or surgeon is a must. Haematoma needs to be excluded, parotid duct disruption as well (possibly due to haematoma), infection and also compensation. If one does not hit all the bellies of the muscles, one belly on the other side may compensate. This is common for the temporalis muscle to do the same, hence one needs to target all areas. All the best, Dr Davin S. Lim. Brisbane. Australia.