Need advice asap, my flight is tomorrow ... May 4. I have horrible nerve pain in my feet, and typically need to apply frozen gel packs that wrap around them with velcro straps about every 2 hours so I can walk. (I'm traveling specifically to get into a clinical trial for my pain). They're the kind of gel packs that are sold specifically for pain, etc. Will these be allowed through security? There's no way they will be completely frozen when I go through - they never completely freeze anyway. I'm just desperate about how to ice my feet both on the plane, and in the airport where I have to change plans. I'm flying on United.