RecruitingProcedureTopical Intranasal Anesthetic Block for Reducing the Pain of Botulinum Toxin Injections for Chronic MigrainePeople find the injections used in onabotulinumtoxinA (Botox®) uncomfortable. This study will test whether putting a small piece of cotton soaked with 4% lidocaine (a numbing medicine) inside the front of each nostril for 5 minutes before the injections reduces injection pain compared with cotton soaked in saline (salt water).