Sometimes, the reason you're unable to fall asleep is not that cut and dry. Food intolerances? Nutritional deficiencies? They can all affect your sleeping habits. Here's what you should know.

If hot summer nights are making it difficult to sleep and turning on the AC isn't an option, here are 11 expert-approved tips to help you drift off to sleep.

Sleep disorders and personal schedules can damage sleep quality. Kristen Knutson of the University of Chicago says "there is laboratory evidence that short sleep durations of four to five hours have negative physiological and neurobehavioral consequences.

In an interview with Vogue Paris, Rihanna confessed that she only gets three to four hours of sleep. Should you be doing the same?

Ever woken up furious because you just dreamed your [partner cheated](https://www.livestrong.com/slideshow/1011388-signs-partner-having-emotional-affair/) on you? It may seem crazy, but what you dream about at night can set the tone for the rest of your day. [A 2013 study](http://journals.sagepub.com/doi/abs/10.

Located underneath the lungs, the diaphragm is a muscle that contracts every time a person takes a breath. This contraction causes the diaphragm to drop down, allowing the lungs to expand and take in air. Hiccups occur when the diaphragm suddenly contracts at other times.

If you are having a tough time getting a good night’s sleep, cutting tyrosine-rich foods out of your late afternoon and evening meal plans might help. Tyrosine is a nonessential amino acid, meaning your body can manufacture it on its own. You’ll find it in numerous foods and even in alcoholic beverages.

Adenosine is a chemical in your brain and body that belongs to a class of substances called neurotransmitters. These substances support basic nervous system communication by carrying “messages” across the gaps between individual nerve cells.

The wrong sleeping positions can affect your whole body, causing immediate pain and long-term damage. Poor sleep posture interacts with existing conditions, such as shoulder injuries and osteoarthritis, to make them worse.

According to the 2000 U.S. Census, 34.3 percent of lesbian couples and 22.3 percent of gay male couples were raising children. The Census data also found that same-sex couples raising children live in 96 percent of the counties in the United States.

Muscular tension may reduce your quality of sleep or interfere with your sleep cycles. Relaxation techniques, changing your sleep position, massage and stretching may alleviate this type of tension.

People who sit at a desk to work most of the day often complain of lower back pain from remaining in the same position for extended amounts of time.