Dry skin patches may be due to a cold climate, the use of harsh cleansers, dehydration, allergies or hormonal imbalance. Eczema is a chronic recurring intensely itchy inflammation of the skin. The cause of eczema is unknown but it is a genetic disease. It arises from interplay of multiple genes with external environmental factors. Self care such as cleansing and moisturizing as well as avoiding triggers will help. There are some medical treatments available also. Have this evaluated by your doctor for proper management. Direct clinical examination is important.
Take care and keep us posted.