Sculptra - Jaw pain after injection, difficulty eating and chewing. How long will this last?

It is not uncommon to have some tenderness for a few days after Sculptra, especially if more than one vial is injected in a single session.  It is important, nonetheless, to massage the treated areas for 5 minutes 5 times a day for 5 days.  It helps to take tylenol to help with any discomfort -- just don't take more than the recommended daily dose.  You might want to drink cold liquids, suck on ice cubes, or apply cold packs to your face to help with the soreness.After you see how even and natural the effect is, you may feel this tenderness is worth it.

Some tenderness for a few days after Sculptra injections is not uncommon and it should go away within a couple of days. It is important to massage the areas. 

It sounds like what you are experiencing it completely normal. Soreness in the deep fascia area is noticed when you open and close your jaw and chew. This should improve daily and be mostly gone by 3-4 days after your injection - if it worsens or does not resolve contact your plastic surgeon. I tell my patients to expect to eat softer foods for a 1-3 days after sculptra because of this soreness. Massage is recommended after sculptra but no specific schedule - some recommend 3 times a day some 5 - just do the best you can to massage these areas even though they are likely sore.