When the inmune system is sick or with lack of vitamins and minerals enough to be healthy, yeast takes over and your ears, mouth, scalp will itch. A good advise, boost you inmune system with supplements. I did it by taking potasium, zinc, selenium, and magnesium for a month, then using cleanse smart for a month, after that I continued with the above supplements plus colostrum and probiotics. Today I take anything that is good for the inmune system. Try it.