Itching All Over the Body – Causes and Treatments. Eczema. Eczema is an inflammatory skin condition which causes itchy, red, and dry skin and can affect any area of the body, and even the palms of your hands. The itching caused by eczema can become very intense, and scratching the itchy skin can lead to secondary skin infections. There are various forms of eczema which cause itchy skin, these are: