My 3 month old has had these purple splotches / dots on his legs for the past couple weeks. They are more like a skin discoloration than a rash.

He seems perfectly happy and healthy. A quick Google search tells me they might be petechiae but then all the random posts / info I find about that occurring in infants is the scary fear-mongering "you should take your baby to the ER NOW!" type stuff. I can't find any facts.

Anyone seen this before? We have a well baby visit in 2 weeks so I was planning to ask then if they are still around...unless you guys think it IS serious..???