My throat has been itching on and off for three weeks no sign of infection according to doctor antihistamines work slightly driving me crazy what can i do?

Probably allergies : If medications to for allergies seem to work then I would ask your doctor to give you an injection of Depo Medrol. That will get rid of your allergies for several weeks. But you can’t get the injection more than twice a year. If you have all year round allergies I would get allergy testing and desensitization. That’s what I did and it made my life so much better. I want that for you as well