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.
1 Vitamin C deficiency anemia. 2  Vitamin C deficiency can develop if you don't get enough vitamin C from the foods you eat. 3  Vitamin C deficiency is also possible if something impairs your ability to absorb vitamin C from food. 4  For instance, smoking impairs your body's ability to absorb vitamin C. Vitamin C deficiency anemia. 2  Vitamin C deficiency can develop if you don't get enough vitamin C from the foods you eat. 3  Vitamin C deficiency is also possible if something impairs your ability to absorb vitamin C from food. 4  For instance, smoking impairs your body's ability to absorb vitamin C.