Our expert says:
Pigmentation from a 5 elements point of view is normally that your liver is taking strain - or even that there has been a hormone change.
Being on your leg it would also relate to a specific meridian.
If it is on the lateral side of the leg it could relate to the gall bladder meridian.
if on the medial (inside part) of the leg - it can relate to the liver meridian.
If in the front - depending where it is - it can either be stomach meridian or spleen/pancreas meridian.
The cause will be difficult to say without taking a case history from you. Which would also be the same on how you can solve it :-(
Apologies i cannot get specific with such a broad question.
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