Hi. Greetings. Do you see any lesions or rashes apart from just itching? If yes please send snaps of private chat or see a dermatologist near you. If it's always due to a specific trigger like sun exposure then it's best to avoid the trigger and also to use sunscreen regularly, also to wear full arm clothes/ user umbrella. Prevention is the best. Since it's an "allergy" there's no other permanent cure. Hope this helps. Warm regards, Dr Govind S Mittal.