Hi My son is 3yrs from past 1week I'm noticing small black patches on his legs n hand Pls see the attached pics. When I press n ask him if there is a pain sometimes he says yes n sometimes no. What is this patches I didn't seen it before on his skin. N he is normally active n doing all activities.os this skin problem r anything else but no patches seen on stomach back n face only hand n legs. Pls help