For myself?
Earplugs and mp3 player and fidget toys and sunglasses and something to chew on (gum or chewy toys or both)....although those are all more prevention than first aid.
Also dry clothes (because I completely freak out if I have to wear wet clothes for too long.....the sensation is unbearable).
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"Coming back to where you started is not the same as never leaving." -- Terry Pratchett, A Hat Full of Sky
Love transcends all.