What Causes Recurrent Scaly Patches Above The Left Nostril?

Hello, For 10 months, I had scaly patches above the left nostril. (It started after some exposure with paper honeycomb at an aviation company. At that time, the paper honey comb also irritated my arms. I wasn t given any form of protection as the immediate superior said it was paper.) I was given Hydrocortisone. When I do not apply it, it comes on, itchy and painful and there would be pus. In August 2011, I started having red scaly patches at the side of my forehead, along the hairline, after a performance where we needed to use elastic straps to secure hats (however the trainer refused to allow us to use back our hats, hence, I think it is caused by hygiene reason.) I was given another cream by the doctor. It flares up quite often and the pimples started growing on it. My doctor said it is ezema. What is happening? Regards.