The more we learn about sleep, the more we discover how important it is for both the mind and the body. It's no secret that lack of sleep can cause problems with learning and the ability to focus.

Sleep and digestion are often thought of as separate aspects of health. But doctors say the two are closely connected. In fact, the relationship between sleep patterns and digestive function is so ...

If you have trouble sleeping, you may take something to help you at night. You may “self-medicate” with illegal drugs, alcohol, or medication. But substance misuse or withdrawal from drugs can cause ...