Best position Sleep on your back- It helps align head, neck & spine as it keeps them in a neutral position. However, it increases chances for snoring.
Sleeping on your side good for people with obstructive sleep apnea, neck and back pain and prone to snoring 💤. Sleeping on the left side can reduce acid reflux. Sleeping on the right side can worsen heartburn.
Worst positions fetal position (knees pulled up to your chest) or sleeping on your stomach is bad for you neck and back, where sleeping on fetal position restrict diaphragmatic breathing.