The side that is best to sleep on depends on individual preference and comfort. Generally, sleeping on the left side can have benefits for digestion, heart health, and overall comfort. It can reduce acid reflux, improve circulation and blood flow, and alleviate back and neck pain. Sleeping on the right side can also be beneficial for heart and lung health, as it promotes better drainage of the lymphatic system.
The cons of sleeping on either side include potential neck and back pain and a greater risk of snoring. Sleeping on the left side can put pressure on the stomach and lead to indigestion or heartburn. Meanwhile, sleeping on the right side can cause issues with breathing, as the lungs are compressed in this position.