Probably, she needs to see her family doctor or a dermatolgist. But if you think it's allergy to some ingredient in the fragrance, she would obviosuly need to wash it off completlely and statrt taking Benadryl 25-50mg q8hrs and Pepcid 20mg q12hrs (Pepcid is complementary to Benadryl, since after all it's a histamine blocker as well). She might need a short course of steroid (like Prednisone 40mg daily x 5 days) to suppress whatever immune reaction her body is having, but she would need a prescription for this anyway. And in the long run, it's important to find out what exactly she is allergic to and she might need to be referred to an allegist for this. Again, one way or another, she would need to see a physician, and I strongly recommend she will do so. I hope she will ge better soon.
P.S. I happen to be a physician, but this is just a opinion as one of the basenote users.