Botox is FDA-approved for chronic migraine prevention in adults with 15 or more headache days per month. Precise injections every 12 weeks reduce frequency significantly.
get startedChronic migraine is defined clinically as 15 or more headache days per month, with at least 8 of those meeting criteria for migraine — typically moderate to severe head pain lasting 4–72 hours, often accompanied by nausea, photosensitivity, and phonosensitivity.
It is distinct from episodic migraine (fewer than 15 headache days per month) and is classified as a neurological condition, not simply a severe headache. The frequency and duration of chronic migraine significantly impair quality of life, work productivity, and daily function.
Patients come in after years of trying preventive medications that either don't work or produce side effects they can't tolerate. The appeal of Botox for migraine is that it works through a different mechanism than oral medications — and for many patients, it produces a meaningful reduction in headache days where nothing else has.
Migraine is driven by complex neurological and vascular mechanisms that are not fully understood. The current leading model involves activation and sensitization of the trigeminal nerve system — a network of pain-sensing nerves in the head and face — along with changes in brain chemistry, particularly involving serotonin and calcitonin gene-related peptide (CGRP).
Chronic migraine often develops from episodic migraine through a process called chronification, which is associated with overuse of acute pain medications, sleep disruption, hormonal fluctuations, and psychological stress. Genetics play a significant role.
Patients with chronic migraine typically experience:
For many patients, migraine begins in adolescence or early adulthood as episodic attacks. Over time — particularly in the absence of effective preventive treatment — the frequency can increase, transitioning to chronic migraine.
Hormonal changes in women, particularly around perimenopause, frequently affect migraine patterns. Some patients find that frequency increases significantly during this period; others experience improvement post-menopause.
Without intervention, chronic migraine tends to persist or worsen. With consistent preventive treatment — including Botox — many patients return to episodic patterns or experience significantly reduced frequency.
Chronic migraine management typically involves a combination of acute treatments (used at the time of an attack) and preventive treatments (used consistently to reduce attack frequency).
At CAMI, Botox for chronic migraine is offered to patients who meet the clinical criteria — 15 or more headache days per month — and who are under the medical oversight of Dr. Reid. We follow the FDA-approved protocol: 31 injection sites across the forehead, temples, back of the head, neck, and upper shoulders, administered every 12 weeks.
We also work to understand the full picture. A patient with chronic migraine may also have hormonal factors, sleep disturbances, or metabolic contributors that CAMI is positioned to address. The most complete outcomes come from addressing migraine as part of a broader wellness conversation, not as an isolated injectable appointment.

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