A little investigative work can help pinpoint why you’re constantly fatigued—and what you can do about it.

Q: I feel tired a lot. I just don’t have the energy to accomplish what seems like a normal amount of work, errands, and a little play in my day. What’s wrong with me?

A: Lack of energy is a very common concern and has many possible origins. Likely it’s a combination of a few different things, so let’s go over the basics to start. It’s important to rule out (test for) anemia and low thyroid function.