Aging and photoaging reduce the capacity of the skin to moisturize itself, so the skin becomes dry. Dry skin is one of the major causes of itchiness in aging skin. Other causes of itchy skin often require the attention of a dermatologist. Identification of the sensitizing agents and limiting exposure to them may reduce the itchiness. Allergies to a host of indoor and outdoor agents may cause itching.
Some medications cause itchiness as a side effect.
Severe itching as well as itching that does not respond to moisturizing should be evaluated by a dermatologist. Liver spots have nothing to do with the liver, and they are not an indication of liver disease. In medical terminology they are called lentigines or lentigos. The edges of the spots are rounded, giving them a resemblance to a large freckle. One may appear by itself, or several may cluster together.