What Causes Irritation In The Throat?

From the last one month I feel irritation in my throat. I also feel some sensation in my left ear. I was a gutkha chewer for fifteen years. I have quitted this habit since last twenty days. I am getting treatment from an ent specialist in my town. He has prescribed medicines like effectum and some enzymes. It was o.k. Fir fifteen days. But since yesterday I have the same feeling. I am a teacher by profession. I use pens containing acetone. Can you suggest the remedies please and can it be cured. Brijesh from karnal.