If you are not sure if your dry skin is something more such as that of psoriasis then you need to see your doctor as these skin conditions do require a different treatment plan altogether.
Even if you do just have dry skin it is still a good idea to see your doctor or other skin expert to get their opinion as most of the treatments that are available do not offer any real solution or long term cure. The products that are available are there to help redness the symptoms of dry skin such as that of itching and flakiness, but as mentioned there is no real long term solution.
There are a number of possible reasons as to why a person develops dry skin and there are instances where the skin has been passed from one generation to the next. In such cases this is more than likely to be eczema, psoriasis or dermatitis and this is why you need to see your doctor if you detect that you are suffering from dryness and especially if you know that there is a family history of this condition.
But this can be quite rare as dry skin is often developed through the years through a number of different means such as that of the weather, poor diet and even the use of poor skin products can have an effect on your skin.
Making some small changes to your lifestyle can have a big impact on your skin such as using intensive moisturizers that are natural and contain a high percentage of natural ingredients. Also making sure that your diet contains leafy green vegetables so as to be acquiring Vitamin A can make a difference.