I have severe sinus and allergy issues. Sometime I hear ringing in my ear; and my hearing of my left ear is really muffled compared to my right it. It takes days for the ringing to stop and my hearing comes back to normal? Can anyone relate to this and what have you done to remedy this problem?

There's really no way to give you an accurate diagnosis over the internet. Only a doctor can tell you exactly what's going on.

Please see your doctor.