raised small tiny in diameter reticulated reddish brown spots location on back ,buttock ,both upper extremity symmetrical, both shin symmetrical , neck, cleavage, below both color bone symmetrical, ,little bit on thigh (newly happened), around half navel area, little bit getting darkness on face .also both side below the mandible jaw area, nasolabial folds (only darkness) i don t have any other medical problem. Only skin getting darker. Rarely when new lesions/spots happens hardly.what could be the diagnosis? thanks .