Itching, which dermatologists call pruritus, is the sensation that provokes scratching. It can be localized, generalized, constant or episodic. It is thought that something in the body triggers a release of a body chemical, such as histamine, that causes itching.  At this time of year, it is most likely due to dry skin.  However, itching can be a symptom of dermatologic disease or a systemic disorder. Examples of skin disease which result in itching are extreme dryness, atopic dermatitis, psoriasis, bug bites and hives. Systemic conditions associated with itching include diabetes, hepatitis, pregnancy, thyroid disease, and kidney disease. Severe itching should be evaluated by a physician.  Mild itching may be treated with OTC hydrocortisone and anti-itch lotions such as Sarna.