A broken collarbone heals well on its own in most cases, but what you do during recovery matters as much as the treatment itself. Certain movements, habits, and even sleep positions can shift bone fragments, delay healing, or cause long-term shoulder problems. Here’s what to avoid.
Don’t Lift or Reach With the Injured Arm
The single most important restriction is avoiding overhead reaching, lifting, and pushing with the arm on your injured side. Your collarbone acts as a strut connecting your shoulder to your chest, and any force transmitted through your arm can shift the broken ends apart. Lifting with your arm before your doctor clears you can displace fracture fragments or, if you’ve had surgery, break the hardware holding the bone together. Either scenario means starting treatment over from scratch.
This applies even when the movement feels manageable. Reaching into a high cabinet, carrying a grocery bag, pushing yourself up from a chair with both arms, or bracing a fall with your hand all send force straight through the collarbone. Stick to using your uninjured arm for everything until you’re told otherwise, which is typically around six weeks for most adults.
Don’t Keep Your Arm Completely Still
This one catches people off guard. While you need to protect the fracture, locking your arm in a sling 24/7 without any movement creates a different problem: frozen shoulder. Your risk of developing this condition increases significantly when you keep a shoulder immobilized for weeks, and collarbone fractures are specifically listed as a contributing cause.
Frozen shoulder involves progressive stiffness that can take months to resolve, sometimes longer than the fracture itself. The way to prevent it is to start gentle motion in your hand, wrist, and elbow right away, even in the first days after the break. These movements don’t stress the collarbone but keep blood flowing and prevent the surrounding joints from seizing up. Once your bone starts showing signs of healing and your pain decreases, your doctor will introduce gentle shoulder exercises. Starting physical therapy shortly after the injury is one of the most effective ways to reduce frozen shoulder risk.
Don’t Sleep Flat on Your Back or Injured Side
Lying flat lets your shoulder fall backward under its own weight, pulling on the fracture site. Rolling onto the injured side in your sleep is even worse, placing direct pressure on the break. Both positions increase pain and risk displacing the bone fragments.
Sleep upright instead, either in a recliner or propped up in bed with pillows behind your back. Place a firm pillow under and around your injured shoulder for support, and use pillows on both sides of your body to keep you from rolling over during the night. Most people find this uncomfortable for the first week or two, but it gets easier as the bone stabilizes and pain decreases.
Don’t Drive With a Sling On
Driving with one arm in a sling is not technically illegal in most places, but it is genuinely dangerous. Studies using driving simulators found that people wearing a sling were involved in significantly more crashes than those using both arms. Even healthy volunteers who simply wore a sling without any injury showed impaired driving ability. Safe driving requires both arms to control the steering wheel, especially during sudden maneuvers.
Most orthopedic surgeons recommend waiting until you are pain-free and no longer taking pain medication before getting back behind the wheel. Your doctor can advise you on when it’s safe, but the legal responsibility is yours. If you can’t confidently grip and turn the steering wheel with both hands, you’re not ready.
Don’t Smoke or Use Nicotine
If there’s one lifestyle factor that can derail your recovery, it’s nicotine. A meta-analysis published in The Bone & Joint Journal, covering over 2,200 patients, found that smoking more than triples the risk of nonunion in displaced collarbone fractures treated without surgery. Nonunion means the bone simply never knits back together, often requiring surgery that wouldn’t have been necessary otherwise.
Nicotine constricts blood vessels and reduces the oxygen supply that bone cells need to rebuild. This applies to cigarettes, vaping, nicotine patches, and chewing tobacco. If you smoke, your recovery period is one of the strongest medical reasons to stop, at least temporarily. Even cutting back makes a difference, though quitting entirely gives your bone the best chance of healing on schedule.
Don’t Ignore Nerve Symptoms
The brachial plexus, a bundle of nerves running from your neck through your shoulder and down your arm, passes close to your collarbone. A displaced fracture can compress or stretch these nerves, and the warning signs are distinct from normal fracture pain.
Watch for electric shock or burning sensations shooting down your arm, numbness in your hand or fingers, or weakness that makes it hard to grip objects. These symptoms suggest nerve involvement that needs prompt evaluation. Weakness in the hand, arm, or shoulder that develops after the initial injury, or numbness that spreads rather than improves, warrants an urgent call to your doctor.
Don’t Rush Back to Sports or Exercise
Contact sports, weight training, cycling, and any activity with fall risk are off limits until imaging confirms solid bone healing. This typically takes 6 to 12 weeks depending on the severity of the fracture and your age. Returning too early doesn’t just risk re-breaking the bone. If the collarbone heals in a shortened position (even shortening of just 1.3 centimeters can affect long-term shoulder function), you may end up with chronic problems like reduced strength or limited range of motion.
Start with the gentle range-of-motion exercises your doctor or physical therapist prescribes and progress only when cleared. Swimming, running, and non-contact activities usually come back before anything involving impact or heavy upper-body loading. Patience during these weeks pays off in a shoulder that works normally for the rest of your life.
What About Ibuprofen?
You may have heard that anti-inflammatory painkillers like ibuprofen interfere with bone healing. This concern has circulated for years based on the theory that these medications suppress part of the body’s repair process. However, the most current evidence suggests the effect is minimal at best. A large meta-analysis published in Frontiers in Endocrinology found no significant difference in nonunion rates between people who took anti-inflammatories and those who didn’t, once other factors were accounted for.
That said, the research isn’t definitive enough to call the question fully settled, and the types and dosages of specific medications weren’t broken down in the analysis. If you’re concerned, acetaminophen (Tylenol) is an alternative that works through a completely different mechanism and carries no theoretical bone-healing risk. Your prescribing doctor can help you weigh the options based on your pain level and fracture severity.