What causes dandruff and why does it always seem to come back?

Here's something you probably didn't know: at least 50% of us suffer from dandruff at some point in our lives. Now, all sorts of things are believed to affect dandruff: climate, hormones, very oily skin, diet, work stress, and even relationship stress. Hmmm, I know what you mean. Having a dry scalp, which is related to having dandruff, can be caused by blow drying your hair, colouring your hair... basically, it's the stuff we all do all the time. The good news is that you can fight dandruff. But you should know that in most cases it can come back as soon as you stop fighting it. Therefore the right way to treat dandruff is to use head & shoulders on a regular basis.