Sleeping on your right side isn’t inherently dangerous for most people, but it can affect the body in a few specific, mostly situational ways.

One of the main concerns is digestion. Because the stomach sits slightly to the left, lying on the right side can make it easier for stomach acid to move upward, which may worsen heartburn or acid reflux in people who already have those issues. For others, it usually makes no noticeable difference.

It can also influence circulation in a mild, temporary way. Staying on one side for too long may compress nerves or blood vessels, sometimes leading to numbness or tingling in the arm or shoulder. This is generally harmless and usually resolves when you shift position during sleep.

Breathing may be slightly affected in some individuals, especially those with snoring or mild sleep apnea. However, side sleeping in general is often better than sleeping on the back, and whether the right or left side is preferable depends on the person’s condition and comfort.