I went to another injector and they said it looks like it could be an allergic reaction. They recommended I take oral antihistamine (Allegra), a topical antihistamine, and I took predisone for the last 2 days. These have done nothing though. I'm getting worried this is permanent (or surgery needed). I've had Hyaluronidase other times with no allergic reactions or problems. it did seemed like they put quite a bit of Hyaluronidase. Has anyone seen this before? Any help is appreciated.