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Skin Functions
The skin is the body's largest organ. Knowing its function and how it is related to the nervous system helps understand how stress can trigger or worsen Vitiligo. It is also important to know the close relation between the nervous system and the system of defence (immune system).
Skin functions
It is a barrier to protect the body against the entry of toxic environmental chemicals.
It prevents loss of essential body fluids and dehydration.
The skin protects the body against invasion by micro-organisms.
The skin plays contributes to the body's supply of vitamin D. Vitamin D3 (cholecalciferol) is produced in the skin by the action of ultraviolet light on dehydrocholesterol.
Melanin, the natural pigment of the skin protects against damage from excessive ultraviolet radiation.
The skin is a part of the body's temperature regulation system, protecting us against hypothermia (excessive cold) and hyperthermia (excessive heat).
The skin is also a huge sensory organ with receptors for heat, cold, pain, touch, pressure, and tickle.
How does repigmentation occur?
New colour may start from the borders of the depigmented area towards the inside..
Small dots of colour may appear inside the affected area and then begin to expand until they cover the whole area.
The entire spot may change colour starting with light pink, pink, and light brown until the normal colour is recovered.
Finally, it is possible to observe a combination of all or any of the above.
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