I noticed a lump on my son's head a few hours ago. He is learning to walk so bumps amd bruises aren't uncommon for him but he hasn't has any big spills today. This soft and fluid filled with no redness or bruising, about an inch and a half in diameter. No change in his behavior at all and it doesn't seem to be causing him any pain. I called the nurse hotline and they suggested I bring him into urgent care but urgent care wasn't much help other than to tell us to watch for any changes. I'll call his pediatrician in the morning but I'm hoping for some peace of mind tonight. Any ideas?