Discover the best and worst sleeping positions for your health. Learn how sleeping on your back, side, or stomach can affect breathing, digestion, pregnancy, and sleep quality—and why safe sleep is especially important for babies.

Sleep is supposed to give your body time to rest, recover, and recharge. But did you know that the position you sleep in can affect your breathing, digestion, spine, circulation, and overall sleep quality?

Some sleeping positions may help reduce snoring, improve comfort, or support the spine. Others may make certain problems worse.

And when it comes to babies, sleeping position becomes even more important. Putting an infant in an unsafe sleeping position can increase the risk of sleep-related death, including sudden unexpected infant death and accidental suffocation.

So, what is the best way to sleep?

Let’s take a closer look.

What Is the Best Sleeping Position?

There is no single sleeping position that is perfect for everyone. Your ideal position can depend on your age, health, pregnancy status, breathing problems, and personal comfort.

For most healthy adults, the three most common positions are:

• Sleeping on your back
• Sleeping on your side
• Sleeping on your stomach

Each has potential advantages and disadvantages.

1. Sleeping on Your Back

Sleeping on your back, also called the supine position, keeps your head, neck, and spine relatively aligned when your pillow provides proper support.

Potential benefits

Back sleeping may:

• Help keep the spine in a neutral position
• Reduce pressure on the shoulders and hips
• Avoid putting prolonged pressure on one side of the face
• Be comfortable for people who prefer an evenly supported sleeping position

A supportive pillow under the head and, for some people, a pillow under the knees can make this position more comfortable.

But there is an important exception

Sleeping on your back may not be the best choice for people with obstructive sleep apnea or significant snoring.

When a person sleeps on their back, the tongue and soft tissues at the back of the throat can move backward and contribute to airway narrowing. This can make breathing interruptions more common in some people with obstructive sleep apnea.

A better approach

If you regularly:

• Snore loudly
• Wake up gasping or choking
• Stop breathing during sleep according to a partner
• Wake up with headaches
• Feel extremely sleepy during the day

talk with a healthcare professional rather than simply changing your sleeping position.

2. Sleeping on Your Side

For many adults, side sleeping can be a comfortable and practical choice.

It may be particularly useful for people who experience snoring or obstructive sleep apnea because sleeping on the side can help reduce the airway obstruction that may occur when sleeping on the back.

How to sleep on your side correctly

Try to:

• Keep your head and neck aligned with your spine
• Use a pillow that fills the space between your head and mattress
• Keep your shoulders relaxed
• Place a pillow between your knees if it improves hip or lower-back comfort

Left side or right side?

Both can be comfortable.

However, some people with nighttime heartburn or acid reflux find that left-side sleeping may be more comfortable, while individual results can vary.

If one side consistently causes shoulder, hip, or neck pain, try changing positions or improving your pillow support.

3. Sleeping on Your Stomach

Stomach sleeping is one of the positions that deserves more attention.

Some people naturally prefer sleeping on their stomach. However, because your head usually has to remain turned to one side for an extended period, this position can place stress on the neck and spine.

It may also increase pressure on the shoulders, chest, hips, or lower back depending on the mattress and body position.

Is stomach sleeping always dangerous?

No.

For a healthy adult, sleeping on the stomach does not automatically mean something dangerous will happen.

However, if you frequently wake up with:

• Neck stiffness
• Shoulder pain
• Lower-back discomfort
• Numbness or tingling

your sleeping position may be worth reconsidering.

4. The Curled-Up Fetal Position

The fetal position—sleeping curled up on your side—is extremely common.

It can feel comfortable and may help people feel secure while falling asleep.

But curling the body too tightly throughout the night may contribute to stiffness, particularly around the neck, back, and hips.

Try this instead

Keep your body slightly relaxed rather than tightly curled.

Your knees can remain bent, but avoid pulling them excessively toward your chest.

A pillow between the knees can also help maintain better alignment.

5. Sleeping With Your Neck Bent Too Far

Sometimes the problem isn’t simply which position you choose.

It’s how your body is positioned within it.

A pillow that is too high can push your head forward. A pillow that is too low can allow your head to drop backward or sideways.

Over several hours, poor alignment may contribute to:

• Neck pain
• Shoulder discomfort
• Morning headaches
• Muscle stiffness

The goal

Your head and neck should remain in a relatively neutral position rather than being sharply bent upward, downward, or sideways.

6. Sleeping in a Reclined or Sitting Position

Some people fall asleep on sofas, armchairs, or recliners.

Occasionally falling asleep this way is different from deliberately choosing it every night.

However, sleeping in an awkward position for prolonged periods may place pressure on certain parts of the body and may not provide the same support as a properly designed bed.

For people with medical conditions affecting breathing or circulation, the safest sleeping arrangement can be different, so personalized medical advice may be appropriate.

The Most Dangerous Sleeping Position for Babies

This is where sleep position becomes a serious safety issue.

For babies under 1 year old, the recommended sleeping position is fundamentally different from many adult sleep recommendations.

Babies should be placed on their backs to sleep.

The CDC recommends placing babies on their backs for every sleep—both naps and nighttime. Babies should sleep on a firm, flat, non-inclined surface designed for infant sleep.

Sleeping on the stomach or side can increase the risk of sleep-related death.

Why Sleeping on the Stomach Can Be Dangerous for Infants

Young babies have limited ability to reposition themselves if their face becomes pressed against a surface.

When an infant is placed face-down, there can be a greater risk of suffocation or low oxygen, particularly when the sleep environment contains unsafe bedding or soft surfaces.

This is why experts recommend putting babies to sleep on their backs—not on their stomachs or sides.

What About a Baby Spitting Up?

One common concern is:

“What if my baby spits up while sleeping on their back?”

According to the CDC, healthy babies are still recommended to sleep on their backs. Their anatomy and gag reflex help protect them from choking while sleeping in this position.

So, placing a baby on their stomach to prevent choking is not recommended.

Avoid These Unsafe Baby Sleep Practices

For infants, the sleep environment is just as important as the position.

Avoid placing these items in the baby’s sleep area:

• Pillows
• Loose blankets
• Soft toys
• Bumper pads
• Sleep positioners
• Other soft or loose objects

The safest setup is a firm, flat sleep surface with a fitted sheet and no loose bedding or soft objects.

The CDC also recommends that babies sleep in the same room as their caregiver, ideally until at least 6 months of age, but on a separate sleep surface rather than in the adult bed.

Sleeping Position During Pregnancy

Pregnancy can change which sleeping positions feel comfortable.

As pregnancy progresses, many people find side sleeping more comfortable.

If you’re pregnant and unsure about the safest sleeping position for your particular stage of pregnancy or medical situation, speak with your obstetrician or midwife for individualized guidance.

Do not rely on social-media claims that one sleeping position is universally dangerous for every pregnant person.

How to Choose a Better Sleeping Position

Instead of asking:

“Which sleeping position is the best for everyone?”

ask:

“Which position allows me to breathe comfortably, maintain good alignment, and wake up without pain?”

Try these simple adjustments:

If you sleep on your back:

Use a supportive pillow and consider placing a pillow under your knees if it feels comfortable.

If you sleep on your side:

Keep your neck aligned and consider placing a pillow between your knees.

If you sleep on your stomach:

Try gradually transitioning toward side sleeping if you experience persistent neck or back discomfort.

If you snore:

Side sleeping may be worth trying, but persistent loud snoring or breathing pauses should be evaluated by a healthcare professional.

If you’re caring for a baby:

Always place the baby on their back on a firm, flat sleep surface with no loose bedding or soft objects.

When Should You Be Concerned About Your Sleep?

Your sleeping position may not be the only reason you wake up tired.

Talk with a healthcare professional if you regularly experience:

• Loud or persistent snoring
• Gasping or choking during sleep
• Witnessed pauses in breathing
• Severe daytime sleepiness
• Repeated morning headaches
• Persistent neck or back pain
• Frequent nighttime awakenings

These symptoms can sometimes be associated with underlying sleep or health conditions that deserve evaluation.

Final Thoughts

The “right” sleeping position depends on the person.

For many adults, side sleeping or well-supported back sleeping can be comfortable choices, while stomach sleeping may cause neck or back discomfort in some people.

But there is one rule that should never be overlooked:

For babies under 1 year old, always place them on their backs to sleep.

An infant’s sleeping position and sleep environment can make a real difference in the risk of sleep-related death. A firm, flat sleep surface, no loose bedding, and a separate infant sleep space are key parts of safer sleep.

A good night’s sleep isn’t only about how long you sleep.

It’s also about how safely and comfortably you sleep.