It sounds like a chemical irritation to me. If she's had it all her life ask her if she's been using the same laundry detergent. I know my family is supersensitive to a lot of them, we switched to Tide and it works for us, but it makes sense it irritates her skin constantly and consistently. Could be as simple as that, I would tell her to switch or just run her clothes in hot water for a couple cycles and see if that works. It won't help if it's still used in the house though, she could still inhale it and get it on her hands from the laundry. Good luck, hope this helps.