Botox is FDA-approved for chronic migraines for patients who have 15 or more headache days per month. Botox is a neurotoxin that is purified and used in tiny doses to temporarily reduces muscle contractions for approximately 3 months.
When injected, Botox enters the nerve endings around where it is injected and blocks the release of chemicals involved in pain transmission. This prevents activation of pain networks in the brain. To perform the injection, your physician will use a very small needle to inject small amounts of Botox into shallow muscles in the skin of the head and neck.