Feel like a terrible Parent. About 2 days ago, our 13 month old decided to bump the back of His head on the Zoo Room’s wooden door frame after saying our ritual “Goodnight” to our Animals… He cried straight away, was easily consoled and has not had any sinister symptoms (like Vomiting, loss of balance etc.) however this weird looking vein appeared, could anybody tell me what it is ? Never noticed if it’s always been there or if it’s appeared just because He bonked it. TIA!