He was completely exhausted for the last 2-3 weeks of term but I thought that was normal, especially for a child just finishing his first year at secondary, who has to set of early for a longish commute.
However, nearly 3 weeks into the holiday, he's still tired all the time. Taking himself to bed around 8pm and staying there until noon, unless there's something he needs to get up for. Often complaining he's too tired to do things he's usually excited to do.
If I take him to the doctors, what kinds of things should I expect them to investigate?