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.
Causes of Itchy Feet at Bed Time. 1  As you are diabetic one of the main cause can be deficiency of vitamins especially vitamin B1, B6, B12. 2  Deficiency of these vitamins can result into many skin diseases. Fungal infection in diabetics is common, and it can be one of the reason for itchy feet. 2  Scabies: this is an itch mite which can cause itching on the feet at night time. 3  The itch can spread all over the body. 4  Contact allergic dermatitis: it is caused due to some material you come into contact with.