A long pillow can prevent you from rolling onto your stomach or back and may make side sleeping feel more natural.

Keep your shoulders relaxed

Avoid curling your upper body excessively.

Choose comfortable sleepwear

Tight clothing can make side sleeping uncomfortable, particularly during pregnancy.

Adjust your mattress

If your shoulder and hip experience excessive pressure, your mattress may not be providing enough cushioning.

What If You Have Acid Reflux?

If you're specifically considering left-side sleeping because of heartburn, there are several additional strategies worth considering.

Try finishing meals several hours before lying down when possible.

Avoid foods and beverages that consistently trigger your symptoms.

Limit very large meals in the evening.

If recommended by your healthcare professional, elevate the head of your bed rather than simply stacking multiple pillows under your head.

And if reflux occurs frequently, interferes with sleep, or requires regular medication, talk with a healthcare professional.

Frequent heartburn shouldn't automatically be dismissed as a minor inconvenience.

What If You Snore?

If you snore occasionally, side sleeping may help.

But if your snoring is loud and persistent, pay attention to other symptoms.

Possible warning signs of sleep apnea include:

• Pauses in breathing during sleep

• Gasping or choking at night

• Waking with a dry mouth

• Morning headaches

• Excessive daytime sleepiness

• Difficulty concentrating

• High blood pressure

If these symptoms are present, consider discussing them with a doctor or sleep specialist.

Sleep apnea can be treated, and identifying it is more important than simply changing your sleeping position.

The Bottom Line

Sleeping on your left side may offer specific advantages for some people, particularly those dealing with nighttime acid reflux or pregnancy-related discomfort. Side sleeping in general may also help reduce snoring for certain individuals.

But there is no universal rule that says everyone should sleep on the left side.

Your health history, anatomy, comfort, and sleep quality all matter.

If you enjoy sleeping on your left side and wake up feeling comfortable and rested, there's little reason to change.

If you experience reflux, experimenting with left-side sleeping may be worthwhile.

And if you're pregnant, have sleep apnea, significant pain, heart or respiratory problems, or another medical condition that affects sleep, personalized advice from your healthcare professional is the safest approach.

Ultimately, the best sleeping position is the one that allows you to breathe comfortably, keeps your body supported, minimizes symptoms, and helps you get consistent, restorative sleep.

Sometimes, a small change—such as turning from your back onto your side or placing a pillow between your knees—can make a surprisingly noticeable difference in how you feel the next morning.