My daughter cut her leg swinging on a rope in a lake ever since this has happened she has had hives it has been 3 months nothing is helping could she?

Chronic urticaria: I assume your daughter is not taking Aspirin or any other daily medicine. Hives every day for 3 months is chronic urticaria. This is due to nervous mast cells producing histamine. It is not allergy. Try generic antihistamine. Cirtrazine (zyrtec) will help. Get 10 mg pills. If 1 a day does not stop hives, she may need 2 or 3 a day. If she is sleepy on this try Loratadine (claratin). See a dermatol.