A member asked:

What are the causes of sebacous cyst on my upper thigh? then its replaced with hyperpigmentation

A doctor has provided 1 answer

Blocked follicle: A cyst forms when a hair follicle opening becomes blocked and sebum accumulates and forms a cyst. Often when they resolve they leave residual hyperpigmentation. This post inflammatory hyperpigmentation will resolve with time.

Answered 6/25/2014

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How to reduce hyperpigmentation on thigh's back?

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