What is melanin deficiency?
The special cells called melanocytes in the skin produce melanin, which is a pigment responsible for skin colouration. Any injury to these cells hampers the production of melanin. Some disorders affect only part of the body, while others affect the entire body. Excessive melanin makes the skin darker, whereas less melanin makes the skin lighter. When the level of melanin reduces below a certain level, it may lead to diseases like vitiligo, causing patches of white skin, albinism or other conditions affecting the skin colour.
What are its main signs and symptoms?
Melanin deficiency appears in the form of various diseases exhibiting the following signs and symptoms:
- Greying of the hair, beard, moustache, eyebrows and eyelashes at a very early age
- Loss of colour of the skin inside the mouth
- Depigmentation of the skin
- Depigmentation in any one or more areas of the skin
- Depigmentation affecting only one side of the body
- Depigmentation affecting the entire body
What are the main causes?
Melanin deficiency can be due to some underlying skin condition which affects the melanocytes and, thereby, melanin production. The following can lead to melanin deficiency:
- Inherited deficiency causing partial or complete lack of melanin, e.g., albinism
- Loss of melanocytes in some or all areas of the body due to an autoimmune disorder, e.g., vitiligo
- Skin injury like an ulcer, burn, blisters, infection, etc., can lead to permanent damage of the skin cells and the melanin in the damaged skin is not replaced.
How is it diagnosed and treated?
The diagnosis is based upon the following:
- Medical history of the individual
- Physical examination to check for white patches
- Blood tests to identify the presence of diabetes or thyroid problems
- Biopsy of the affected skin
Treatment depends on the cause of melanin deficiency. The doctor may recommend the following:
- Corticosteroid creams
- Narrow-band ultraviolet B therapy
- Photochemotherapy
- Laser treatment
Some effective home remedies are:
- Sunscreens
- Cosmetics, such as a concealer