Extreme itchiness - what causes it besides skin disorders?

besides allergies or skin conditions like eczema and seborrhea can cause extreme long lasting skin itchiness? internal or mental conditions?

Extreme itchiness - what causes it besides skin disorders?
Dry Skin, nervousness, dust mites, (from cleaning dusty dirty what evers) flea's , If you just got your hair cut the fine hair on your skin will make you itch, to much soap in your laundry,
Reply:AIDS
Reply:itch powder
Reply:itchiness can be caused in winter months by dry skin which becomes dry because of the dry air your house heat produces. Normal air humidity in summer is 50%--in winter it can drop as low as 20%. This will dry your body skin and make it itch as it becomes dehydrated. Try getting a good humidifier for your home. Sears makes a good 5 gallon one with a fan, and it works great. My winter itchiness has all but stopped since I have been using it in the last 5 years. Good luck.