Botox is clinically proven for relaxing your jaw muscles and to prevent jaw clenching. If you suffer from chronic headaches or migraines due to jaw clenching, botox injections can dramatically reduce the frequency and severity of your headaches. The effect of this treatment approximately kicks in within ten to fourteen days with expectancy to last from four to nine months. This is a safe and effective treatment with minimal to no downtime, some clients experience side effects of minor swelling or pain at the injection site that can last up to three days.