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What Causes Coughing Up Dark Stuff?
Skin that has turned darker or lighter than normal is usually not a sign of a serious medical condition.
See also:
Alternative Names
Hyperpigmentation; Hypopigmentation
Considerations
Normal skin contains cells called melanocytes. These cells produce
Skin with too much melanin is called hyperpigmented skin.
Skin with too little melanin is called hypopigmented skin.
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