Six Kinds of Tired: It’s Not a Diagnosis Yet

Feeling wrecked is not one thing. It’s at least six different things, they have different causes, and — this is the part that matters — they need opposite responses. Some call for rest. Some get worse with rest. Some need food. A couple need a doctor. Most people treat all of them the same way, which is why “I just need a rest day” works brilliantly sometimes and does nothing at all other times. Here’s how to tell them apart.