My 6 year old son has woken up the past two days complaining of his gums (lower, in front of his front teeth) hurting. We rinse it with water, but doesn't seem to help. He doesn't complain later in the day - mostly, only when he wakes up. He hasn't lost any teeth yet. When I ask him to pull out his lower front lip, so I can look with a small flashlight, he says it hurts. I looked, and only see slight red, but I feel that it's the normal color of his gums.