Oral pain relief medication is never necessary for facial filler injections. There are many tricks to minimizing the discomfort of these injections. Usually "fear of the unknown" is the worst part. The more tense you are, the more you feel. The following are my suggestions to minimize discomfort:
1. Most facial fillers, including Restylane and Juvederm, come pre-mixed with lidocaine, which helps considerably.
2. I use a topical anesthetic ointment containing Lidocaine, Prilocaine and Phenylephrine which really works if you give it enough time before the injection.
3. "Talk-Aesthesia" to relax the patient.
4. A squeeze ball as a last resort because it can be counter-productive to tense up any part of your body (as a patient of mine, a Tai Chi instructor, pointed out).