what causes itching all over your body
1 Allergic reactions may be accompanied by hives or rash.  Skin Conditions- Skin conditions such as eczema or sunburn can cause the body to become itchy all over as the body reacts to the condition. Stress or anxiety may stimulate such conditions, leading to itching that is not localized to a particular area.
One of the most common causes of having itchy rash all over bodyis allergy. Allergic reactions can be mild or severe. You develop a rash when you are exposed to an allergen. If it is a mild reaction, you may only develop rashes over your body with itching.