Tightness on jaw joint after Botox masseter reduction procedure, is it normal? When & how can this swelling & tightness go away?

Thank you for your question. Mild swelling is to be expected after a masseter injection. You may want to consider scheduling a follow up appointment with your injector to discuss your other symptoms. Best, 

Thank you for sharing your case.  It is normal to have some soreness after your treatments.  I usually recommend ice to the treated area to help that to go away.  Make sure to always see a board certified physician for your injections.  Aestheticians are not licensed to give Botox injections in New York State.

It sounds like she injected quite a bit of Botox. Are you sure it was not dysport?  It may cause swelling for a few days. This could be due to a bruise.