Unknown condition resulting in blistering

[BryanK]

Good afternoon all,

I have a friend who has been laid up in the hospital for a few days now, and they have no idea what has caused this blistering(all on same arm), her symptoms, or how to treat it(from what she's told me). They've ruled out bug bites.

I'm just trying to help a friend with any leads that she could pass onto her physicians. I've attached photos, and her current condition is:

• 104 degree fever that hasn't broken
• Redness all over the body
• Dehydrated
• Chronic headaches/migraines

I really appreciate any help with this. Thank you for reading.