Unfortunately the stinging lasts awhile. My doc said 4-6 weeks post radiation but i'm sure it depends on the case. Chicken broth doesn't seem to sting, Milk and any juice does. Also wash it down with water reduces the stinging for the lower stinging stuff.

SCC R-Tonsil T2 NO MO Dec 2003. Completed IMRT Radiation only to tonsils(72Gy) and neck(55Gy)March 04. Detected at age 50.