Itchy, Dry Skin

Why is my skin so itchy and dry?
Itchy skin is an uncomfortable, irritating sensation that makes you want to scratch. And the more it itches, the more you scratch. While the cause may be as simple as the clothes you are wearing or the detergent you use, itchy skin can also be a symptom of a rash, skin condition or more serious illness.
Causes of Itchy Skin
Medications
Certain medications can trigger a reaction that makes you itch. Common culprits include antibiotics, antifungals, antimalarials and pain medications.

Dry skin
As the skin loses moisture and lipids, the barrier weakens and the skin is more easily irritated and inflamed, resulting in dry, itchy skin.
Harsh cleansers
Chemicals in soap can strip the natural oils from the skin, leaving it dry, scaly and itchy.
Heat/Dry Air
Central heating, wood-burning stoves and fireplaces can be very drying to skin.
Rashes
Allergies or skin conditions can cause skin to be itchy.
Health conditions
Itchy dry skin is associated with common medical conditions such as atopic dermatitis, psoriasis and diabetes.
Medications
Certain medications can trigger a reaction that makes you itch. Common culprits include antibiotics, antifungals, antimalarials and pain medications.
Stress
Worrying can make you itch. Anxiety and stress can worsen atopic dermatitis and depression can intensify the itch from psoriasis and other conditions. Constant hand-washing caused by obsessive-compulsive disorder can also dry and damage your skin.

Tips to soothe itchy, dry skin
Avoid the triggers that make you itch. Try to identify what's causing you to itch and avoid it as best you can. The source might be rough fabrics; an overly heated room; too many hot showers or exposure to a cleaning product.
Moisturize twice daily. Apply moisturizers in the morning and at night, or immediately after bathing to help trap moisture in the skin. Look for hydrating ingredients like glycerin, mineral oil, petrolatum and dimethicone that help maintain the skin barrier.
Avoid scratching whenever possible. If you can't keep from scratching it, try covering it. Keep your nails short and wear gloves at night.
Reduce stress. Now might be a good time to try meditation or yoga as an outlet to relieve stress.
Use a humidifier. A humidifier at night will help add moisture back into the air.