My 14 year old son has been ill for well over a week. He can get up and do things, but not for long. He is having a lot of stomach churning around his belly button region. His main complaint is nausea and lighheadedness. He want to sit around and do nothing which is opposite of his personality.
I think he has a viral infection ... or what is called a "stomach flu". At the same time, his symptoms are very vague and do not point to any one diagnosis. It might be a good idea to take him to his physician and get his bloods done. (I mean, tests done).