IMHO, and based upon personal experience, YMMV:

If burns are extensive, you keep them clean and moist and get the patient to the ER. If burns are not extensive, but affect flexor surfaces like hands, or tender parts, you keep them clean and moist and get them to the ER. If burns are not extensive, and do not affect parts that will suffer loss of function, you can treat them as abrasions and be pretty successful. The various gel pads, non-adherent dressings, roots, herbs and berries seem to do no harm, and may offer some topical comfort, but are more suitably kept in a first aid closet than a first aid kit. ER 's and burn centers use silver sulfadiazene for second degree burns, and some docs will send you home with some, some folks keep some in their kits. And some folks keep Barbie bandaids in their kits, cuz they offer some comfort, too. I would assert that carrying the burn dressing stuff in the FAK is kind of like carrying a pair of cruthes in the FAK: might be useful, but there are better ways to use the space.

Lidocaine is not used on extensive areas of broken skin because of the danger of systemic absorption. Absorbed lidocaine can decrease heart muscle irritability-which is why we use it IV for some dysrrhythmias- and can affect the cenral nervous system, causing stupor and convulsions.