I have a 5 year old boy, two day ago he was playing outside.I go outside to check on him when I see a greenish purplish all most black, ring on the top lips. I thought it was dirt so I wash his face it did come off. What is this, does this go way in time?
Thanks for your query, I have gone through your query. The greenish or purplish area over the lip could be an ecchymosis secondary to any injury to the lip like lip biting or any external injury. Nothing to be panic, wait for 1 week, if the lesion does not heal then consult an oral physician and get it evaluated.  I hope my answer will help you, take care.