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ankle discoloration
I noticed that my outer ankles have some dark discoloration. I don't know what it's from. I had one family member tell me that I should soak them and gently rub with a pumice, but it didn't seem to help. I have started to use a bleaching cream and it looks as though it has gotten darken, so I discontinued use. I have no idea what triggered this and thought maybe some could possibly tell me what causes this discoloration. I
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Avatar_universal
Hi,
Hyperkeratosis is a thickening of the skin that occurs due to excessive accumulation of keratin in the outer layers of the skin. Thickening of the skin protects it against rubbing, pressure and irritation. The majority of the forms of hyperkeratosis are painless.

Hyperpigmentation accompanies this type of hyperkeratosis which is due to repeated contact or pressure between the body and the environment.
This is commonly seen on the elbows, knees and ankles on the bony surfaces, more commonly seen in dark skinned individuals.

Treatment of hyperkeratosis depends on the type, location, severity and cause. Most treatments are aimed at softening the keratin and removing the thickened skin. This may be accomplished with topical creams that contain as the active ingredient salicylic acid, alpha-hydroxy acid (lactic or glycolic acid), urea, or tretinoin.

You can also use skin lightening agents like Hydroquinone 2-4% on the areas of discoloration which is a skin bleaching agent.
Scrubbing and rubbing these areas, which is often your natural inclination, will simply make the problem worse.

ref:http://www.brownskin.net/hyperkeratosis.html

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ankle discoloration
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