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.
Skin Problems. You need the essential fatty acids for keeping your skin healthy, so not getting enough fat in your diet can cause skin problems. An essential fatty acid deficiency increases the loss of water from your skin, which results in a dry, scaly rash.This type of deficiency can also make it harder for your wounds to heal.at-Soluble Vitamin Deficiencies. You can develop deficiencies of vitamins A, D, E and K if you don't get enough fat in your diet because your body can only absorb these nutrients in the presence of fat.