Thank you for asking your query at DoctorSpring
Yes, this itching which you are experiencing can be a part of the allergic reaction to some of the ingredients in the orange juice. Since you have this history of allergy to food items and seasonal allergies it is quite possible that this is an allergic reaction. Orange juice can contain slight amount of salicylates (naturally). This component may be the culprit here.
It's a good thing that you have stopped the orange juice consumption. I recommend you to take a balanced nutritious meal, which are allergy-safe from your experience. Go for the safes, non-allergic food as per you experience.
Just take Benadryl for 1 more day (since when you stopped the orange juice). You can stop it and see how your body responds. If the itching still persists for more than 48 hours, we need to look into other possible allergens. You may want to visit a Doctor too, in person.
Hope this helps