Think about anything you're actually putting on to your skin obviously, so your make up, your moisturizers. Also, have a look for the British Skin Foundation sign. For the actual itching itself, you can put some cream on, creams that contain calamine can be helpful, but think about everything, think about your washing powder, your fabric conditioner, make sure they have been dermatologically tested. Also you might find having a bath in oats wrapped in muslin - put that in your bath and soak in that, and it makes it all nice and milky and that can be really quite soothing. You can give that a try.