I give good care to my cleanness,
and I tried to clean them with normal
and moisturizing soap with hot water
and a hard sponge, but it didnt help.
There are no pimples, no pain, no rough skin, or special sensation.. just like the other parts of the skin, but darker.
What can they be and how can I remove them ?
EDIT : I have just found some photos of people having the same thing (it seems it is wide spread ).