I'm not sure if this is the best place to ask, or if the disability travel forum would be better...

I'm having muscle spasms in my back and shoulders. Heat helps a lot. Should there be a problem plugging my heating pad in and letting it run for most of the flight? We're in main cabin select bulkhead seats (middle/window), if that makes a difference.

As an alternative, should there be a problem getting those chemical heat packs through security? I'm thinking therma-care or similar where you expose them to air and they get hot.

Thanks!