You know the feeling. It’s getting close to bedtime, you get sleepy, and you start yawning automatically. You may even find ...

While excessive yawning is often attributed to being sleepy or bored, it may be a symptom of an underlying medical condition. Below are some of the most common — and less common — causes to ...

Tell me, when does a person normally yawn?” “Usually, when the person is very sleepy.” “Yes, we all yawn when we’re sleepy. Can you think of any other occasion when a…” “A person ...