Never goes away.....

Hi, I'm fairly new to psoriasis and have been given some 1% hydrocortisone cream for small patches on my arms and legs. It worked really well and I was so pleased but in the patient information it said not to use for more that 7 days so I stopped using it and within 3 days it was back to nearly as bad as it was. I was told to use it to get it under control and I could start to use it again whenever it comes back! If it comes back straight away what do I do?! I also have small patches on my cheeks which the doc says I can treat with the 1% but not for too long. If it only goes away for about 5 days, then comes back as before then I don;t see the point. Does anyone else have this problem. Thanks. Babs.