Sleeping on your back in a semi-upright position is the safest and most comfortable way to rest with a broken sternum. Most people find that elevating their upper body to about 30 to 45 degrees, using a wedge pillow or a stack of firm pillows, takes enough pressure off the breastbone to make sleep possible. The pain from a sternal fracture can persist for 8 to 12 weeks, so finding a setup that works early on makes a real difference in your recovery.
Why Back Sleeping Works Best
Your sternum sits right at the front of your chest, connecting your ribs and absorbing force with every twist or compression of your torso. Sleeping on your back distributes your weight evenly and keeps your chest in a neutral, unloaded position. This minimizes the movement between the fractured bone edges, which means less pain and a better environment for healing.
Stomach sleeping is off the table entirely. It places your full body weight directly onto the fracture site and forces your neck into rotation, which pulls on the muscles attached to your upper chest. Even if you could tolerate it, the sustained pressure would aggravate the injury and potentially slow bone healing.
Setting Up Your Bed
A wedge pillow angled between 30 and 45 degrees is the simplest solution. Start at the steeper end of that range in the first couple of weeks when pain is worst, then gradually lower the angle as healing progresses. If you don’t have a wedge pillow, stack two or three firm pillows in a staircase shape, or place a folded comforter under your regular pillows to create a ramp. The goal is a smooth incline from your lower back to your head so your spine isn’t kinked at a single point.
A few additional pillows make a noticeable difference:
- Under your knees: A small pillow here works with your spine’s natural curve and takes tension off your lower back, which helps you stay on your back longer without shifting.
- Under each arm: Resting your arms on folded blankets or low pillows keeps your shoulders from pulling forward and tugging on your chest wall.
- Head pillow height: Choose a pillow that keeps your head neutral. Too flat and your chin points toward the ceiling, straining your neck. Too thick and your chin pushes toward your chest, which can tighten the muscles across your sternum.
If you have an adjustable bed, set the head section to that same 30 to 45 degree range. It provides more consistent support than stacked pillows, which tend to shift during the night.
Side Sleeping as a Backup
Strictly back sleeping for weeks is difficult for many people. If you need to sleep on your side, it can work with some precautions. Place a firm pillow between your knees to keep your hips aligned and prevent your upper leg from pulling forward and twisting your torso. Keep your thighs roughly in line with your body and bend your knees only slightly. Avoid curling into the fetal position, which rounds your upper back and compresses the front of your chest right where the fracture is.
Your pillow needs to be thick enough to fill the gap between your shoulder and your ear so your head doesn’t droop. If your top arm tends to fall forward across your chest, support it with a pillow in front of you to keep it in a neutral position. This prevents the weight of that arm from rotating your rib cage and stressing the sternum.
Getting In and Out of Bed Safely
The moment most people aggravate a sternal fracture isn’t during sleep. It’s the transition from lying down to sitting up. A standard sit-up motion contracts your abdominal and chest muscles hard, sending a spike of pain through the fracture.
Instead, roll onto your side as a single unit, keeping your shoulders and hips turning together rather than twisting at the waist. Once on your side, let your legs drop off the edge of the bed while you push yourself up sideways with your lower arm. This transfers the effort to your arm and hip rather than your chest wall. To lie back down, reverse the process: sit on the edge, lower yourself sideways onto your arm, then roll onto your back as one piece.
Managing Pain That Disrupts Sleep
Pain from a sternal fracture tends to spike with deep breaths, coughs, and any twisting motion. At night, when you’re trying to relax and breathe deeply enough to fall asleep, this creates a frustrating cycle. Taking pain relief about 30 minutes before bed gives it time to take effect while you’re settling in.
One thing worth knowing: prolonged use of common anti-inflammatory painkillers (like ibuprofen or naproxen) for more than two weeks has been linked to a significantly higher risk of fractures not healing properly. Short-term use under two weeks does not appear to carry that same risk. Acetaminophen (Tylenol) does not affect bone healing and is a reasonable baseline option for nightly pain control. If over-the-counter options aren’t enough, talk to whoever is managing your fracture about alternatives that won’t interfere with bone repair.
Protecting Your Chest While You Sleep
Coughing or sneezing in the middle of the night can be the worst part of a broken sternum. A simple technique called splinting helps: keep a pillow within arm’s reach and hug it firmly against your chest before you cough, sneeze, or even laugh. The compression from the pillow supports the fracture externally and significantly reduces the sharp pain. Some people find it helpful to fall asleep already holding a small pillow against their chest, especially during cold and allergy season when nighttime coughing is more likely.
If you cough frequently due to a respiratory condition or because of mucus buildup from being less active, a chest support vest that wraps around your entire rib cage can provide continuous splinting without needing to grab a pillow each time.
Breathing Exercises Before Bed
One of the real risks of a sternal fracture is that pain causes you to take shallow breaths, especially while sleeping. Over days and weeks, shallow breathing allows mucus to pool in the lower parts of your lungs, which can lead to pneumonia. This is a preventable complication, and a few minutes of deliberate breathing before bed goes a long way.
Diaphragmatic breathing, where you focus on expanding your belly rather than lifting your chest, lets you take full breaths with less movement at the fracture site. Place one hand on your stomach and one on your chest. Breathe in slowly through your nose, directing the air downward so your belly hand rises while your chest hand stays relatively still. Exhale slowly through pursed lips. Five to ten minutes of this before sleep improves your lung capacity and also works as a genuine relaxation technique that can help you fall asleep faster.
If you were given an incentive spirometer (a clear plastic device you breathe into), use it several times during the day and once before bed. It encourages deeper breaths and helps keep your lungs fully expanded.
How Long Sleep Will Be Difficult
Most isolated sternal fractures heal on their own over about 10 weeks, though many people feel significantly better by 4 to 6 weeks. Chest pain, however, can linger for 8 to 12 weeks, and nighttime discomfort often outlasts daytime pain because you can’t control your position while you’re unconscious. Expect the first two to three weeks to be the hardest for sleep. By week four or five, most people can start lowering their wedge angle and may be able to sleep on their side more comfortably. Full return to sleeping in any position you want typically lines up with the 10-week mark, though some people deal with residual soreness at night for a few weeks beyond that.