As we enter the wintertime, on the verge of another bout of winter weather, we would like to focus a bit more on itching of the skin. Itching, after all, is most common in the winter. Itching can be localized to certain areas of the skin, for example in the skin over bug bites. In uncommon cases, it can be widespread, affecting all the skin. The best dermatologists know that the number one cause of widespread itching without a rash is dry skin. In most cases of widespread itching all over due to dryness, you may have little or no rash.