The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans(oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust).
The problem behind your itchy skin might be insufficient vitamin intake. There are a number of vitamins that promote the hydration and healthiness of your skin. A shortage in these could trigger itchiness, dry skin and other skin conditions. Alternatively, an overdose of such vitamins might also lead to itchy skin.
Vitamin A for Skin Repair. Nobody wants dry, flaky skin. So grab an orange, carrot, or slice of cantaloupe. They're loaded with vitamin A. You can also find it in leafy greens, eggs, and low-fat dairy foods. When you use a skin product with vitamin A, your wrinkles and brown spots may look better.