My son has woken up with a light grey front tooth ?
If the tooth is not hurting him, there is no need to rush to an emergency appointment. There would not be anything the dentist can do today that would change in a few weeks. There are several causes for a grey color. Trauma or medication from when the tooth was still forming below the gumline are common causes. The tooth may have erupted more recently and now you are seeing the discoloration, where as before you were only seeing the white tip. As long as he is not complaining of sensitivity and you do not see a “pimple-like” blister above the tooth on the gum, then it should be fine to wait for the appoinment. The blister would indicate and abscess and that the tooth is dying.