Here’s what the evidence actually says about sleeping positions:
Sleeping on your right side
For most people, it’s perfectly normal and not harmful.
However, some people with acid reflux or Gastroesophageal reflux disease may find that sleeping on the right side makes nighttime heartburn worse because stomach contents can reflux into the esophagus more easily.
Sleeping on your left side
Research suggests the left side may:
- Reduce nighttime acid reflux in some people with GERD.
- Be more comfortable during pregnancy because it can improve blood flow to the uterus and kidneys.
Sleeping on your back
Can be comfortable for many people, but it may worsen:
- Snoring
- Obstructive sleep apnea in susceptible individuals.
Sleeping on your stomach
Often places extra strain on the neck and lower back, although some people still find it comfortable.
Should you change your sleeping position?
Only if your current position is causing problems, such as:
- Frequent heartburn
- Neck or back pain
- Loud snoring or pauses in breathing during sleep
- Shoulder pain from pressure
Bottom line
There is no evidence that always sleeping on your right side means you have a hidden illness or that you “should have” any particular condition. The best sleeping position is the one that lets you sleep comfortably while minimizing symptoms of any medical conditions you may have.
If you have frequent nighttime heartburn, loud snoring, or waking up gasping for air, it’s worth discussing those symptoms with a healthcare professional, as they may indicate a treatable condition rather than simply a sleeping-position issue.
