Skin that has turned darker or lighter than normal is usually not a sign of a serious medical condition.
[b]Considerations]
Normal skin contains cells called melanocytes. These cells produce melanin, the substance that gives skin its color.
Skin with too much melanin is called hyperpigmented skin.
Skin with too little melanin is called hypopigmented skin.
Pale skin areas are due to too little melanin or underactive melanocytes. Darker areas of skin (or an area that tans more easily) occurs when you have more melanin or overactive melanocytes.
[b]
Call your doctor for an appointment if you have]
* * * Skin discoloration that causes significant concern
* * * Persistent, unexplained darkening or lightening of the skin
* * * Any skin sore or lesion that changes shape, size, or color
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