I have found that switching back and forth between cold/hot at the end of a shower works even better. I first increase the water temp to as hot as I can stand it and focus the spray on the areas of pain and sensitivity. Then switch to cold and cool down the entire body then focus the spray on the areas of pain as long as possible, then switch back to hot right on the pain. The sudden change in temp has a dramatic numbing affect. I do this 3 times and end with cold. The pain is usually gone afterwards. Using this method has cleared headache, toothache from dental work, shoulder muscle strain, stiff neck and lower back pain.