★★★★★
I've had a Cefaly neuromodulation device for about 2 years. It was almost unendurable to use at first, probably due to this over sensitisation effect. I used it as recommended, daily, for the first month or two but I admit I slackened off and used it only occasionally thereafter. Gradually it became easier to use and I restarted the daily use this year. Only then did it really work. I've had only one migraine in the last two months (usually average 13 per month).
It's not cheap (about £300) and the electrodes have to be bought regularly (they last longer if you're scrupulous about cleaning your brow before use, and putting them straight back on their plastic sheet afterwards). However, this device has broken a chronic migraine condition that's lasted decades.
I should add, I've been careful never to overuse migraine medicines, though I suspect the bar is set too high, especially for ergotamine-containing meds and some people can probably go into overuse while keeping well within the recommended limits.
Eliminating any source of inflammation, so far as possible, also has a role to play. Gum health is critical and food intolerances should be explored.
I also take a couple of supplements and it's taken a few years to hit on a combo that seems to work for me. Magnesium L-Threonate, a B multi; and Vitamin D in Winter. I do better without the high dose vitamin B2 recommended by headache doctors.