Although scientists do not have the right answer regarding the appearance of eczema it is very hard to find proper ways of preventing it. In most cases it is believed to be transmitted genetically but it can also appear because of other factors. Or it can be influenced by exterior factors that can generate outbursts.
Usually the factors that can influence it are the same factors that influence allergies. This does not mean that eczema is an allergy. They are two very different conditions and they should be treated in different ways. The most common factors that should be avoided are pollen, dust, smoke and others such. An important part of prevention this condition is keeping the skin healthy. Drinking a lot of fluids keeps it hydrated. Also if it is very cold you should use moisturizer in order to protect your skin.
One cannot always avoid the typical factors that can trigger eczema but it is important not to expose your skin to damaging factors for long periods of time.