DermNet provides Google Translate, a free machine translation service. Note that this may not provide an exact translation in all languages

Skin pigmentation problems

The colour of skin and hair is mainly due to the amount of brown melanin pigment mixed with blue (from reduced haemoglobin), red (from oxyhaemoglobin) and yellow (from carotenoids in the diet). The amount of melanin is determined by constitutional colour (white, brown or black skin) and skin phototype, i.e. the result of exposure to ultraviolet radiation (tanning).

Increase in melanin (hyperpigmentation or hypermelanosis) can be due to an increased number of pigment cells (melanocytes) or from increased production of melanin.

Reduction in melanin results in pale patches (hypopigmentation or hypomelanosis) or white patches (leucoderma). See DermNet's article on pigmentation disorders for more details.

Generally dark skin

Darker skin patches

Pale or white skin/patches

See smartphone apps to check your skin.
[Sponsored content]

 

Related information

 

On DermNet NZ

Other websites

Books about skin diseases