I've never heard of the red light therapy for radiation damage to the throat. 20 years ago I was diagnosed with tonsil cancer and treated with chemotherapy and radiation. Over time the effects of the radiation has caused a lot of problems. Loss of jawbone tissue which caused the loss of molars, nerve damage, difficulty swallowing, compromised my immune system, etc. I'm not sure at this stage - so long after the treatment - that the red light would help. But, it is something I will look into.