The most skin fungus on the planet is not your typical skin rash but instead is a fungus on the scalp and this is called dandruff. You guessed – that shampoo for itchy flaky scalp is not just from excess products on the scalp such as shampoos and things of that nature but are started by a fungus that jut about every human being has on their scalp and this fungus then feeds off of the scalp oils and in turn begins to grow at a fast rate causing the itching and flaking associated with dandruff. So what should you do? The answer is not your typical drug store shampoo like Head and Shoulders. The best way is to gentley kill the scalp fungus and that will eliminate your dandruff.