Rare Botox Side Effects - Swollen Tender Bumps, Not Going Away? (photo)

If you haven't followed up with your provider, that is the first step - and what you've described and photo's provide, isn't something that happens with cosmetic Botox injections. If it was a reputable and well-credentialed provider I would return to them for further treatment and/or their assistance.

Your pictures are quite telling aas they show hematomas from injection technique and/or easy bruisibility that caused hematomas or perhaps you being on aspirin or NSAIDs that resulted in hematomas - these can be painful and will resolve (fortunately). Prednisone is not going to alter the natural history of this except perhaps reduce some inflammation. IN regards to the masseter injection, seek the doctor who treated you as soon as you can.