A broken collarbone takes about 8 to 12 weeks to heal in adults, though the timeline varies significantly by age. Adolescents typically heal in 6 to 8 weeks, children under 8 in 3 to 6 weeks, and babies in roughly 2 weeks. These numbers represent clinical union, the point where the bone is stable enough to handle normal loads. Full recovery, including strength and range of motion, often takes longer.
Healing Timelines by Age
The younger you are, the faster your collarbone knits back together. Children’s bones have a thicker outer layer of growth tissue and a richer blood supply, which accelerates every stage of repair. Here’s what to expect:
- Babies: About 2 weeks
- Children under 8: 3 to 6 weeks
- Adolescents: 6 to 8 weeks
- Adults: 6 to 12 weeks, with most falling in the 8-week range
These ranges assume the fracture is straightforward and treatment goes smoothly. Displaced fractures, where the bone ends have shifted apart or overlapped, sit on the longer end of each range. Fractures that stay well-aligned tend to heal faster.
How the Bone Actually Repairs Itself
Bone healing happens in three overlapping phases, and understanding them helps explain why recovery feels the way it does at different points.
Within the first 24 hours, your body floods the fracture site with blood, forming a clot. Immune cells arrive to clear damaged tissue, and signaling molecules begin recruiting the cells that will build new bone. This inflammatory phase is why the first few days involve the most swelling, bruising, and pain.
Over the next several weeks, your body lays down a soft callus of cartilage that bridges the break. You may feel a firm bump forming at the fracture site. This is normal. That soft callus gradually hardens into woven bone through a process called ossification. By the time your doctor says the fracture has “healed,” this is the stage that’s complete.
Remodeling continues for months after clinical union. During this phase, the body reshapes the rough woven bone into smoother, stronger bone that matches the original structure. The visible bump at the fracture site slowly shrinks, though in some people a small ridge remains permanently. This remodeling process can continue for a year or more, even though you’ll be back to full activity long before it finishes.
Surgery vs. Nonsurgical Healing
Most collarbone fractures heal without surgery. Treatment typically involves a sling for support, pain management, and gradual rehabilitation. The overall healing timeline for nonsurgical treatment is the same 6 to 12 weeks in adults.
Surgery (usually a metal plate screwed to the bone) becomes a consideration when the fracture is significantly displaced. The current threshold is about 1 centimeter of shortening, meaning the broken ends have overlapped enough to shorten the collarbone by that amount. A shorter collarbone changes the position of your shoulder and how your shoulder blade moves, which can cause lasting weakness when you load the arm. Surgery restores the bone to its correct length and holds it there.
The biological healing time after surgery is similar to nonsurgical treatment. The difference is mechanical stability: because a plate holds the bone in place from day one, some surgeons allow earlier movement, which can reduce stiffness. That said, the bone itself still needs the same weeks to grow back together, whether or not there’s hardware involved.
What Recovery Looks Like Week by Week
Weeks 0 to 2
This is the most restrictive period. You’ll wear a sling whenever you’re awake and moving. The main goal is pain control and protecting the fracture. You can take the sling off to gently stretch your elbow and wrist, which prevents stiffness in joints that aren’t injured. At night, try sleeping propped up or on your back with pillows supporting the injured arm. Many people find that sleeping upright in a recliner is the most comfortable option during this phase.
Weeks 2 to 6
You’ll start gentle shoulder exercises during this window, though the sling stays on for comfort when you’re out and about. Pendulum exercises are usually the starting point: bend at the waist, let your arm hang, and gently rock your body so the arm swings in small circles. You can also practice raising both arms overhead with your hands clasped together, letting the uninjured arm do most of the work.
Lifting is still very limited. For the first six weeks, you should avoid picking up anything heavier than a cup of tea or a phone, roughly 250 grams. That means no grocery bags, no carrying children, and no pulling open heavy doors with the injured side.
Weeks 6 to 12
Once your doctor confirms the fracture is stable (usually with an X-ray around week 6), the sling comes off and rehab ramps up. You can gradually increase lifting to about 10 pounds and begin active exercises where your shoulder does the work on its own. Wall crawls, where you “walk” your fingers up a wall to raise your arm, help rebuild range of motion. Isometric strengthening exercises, where you push against a wall or squeeze a pillow without actually moving the joint, safely rebuild muscle around the shoulder.
Driving typically resumes around the 6-week mark, provided you can lift your arm without pain and have enough strength to control the steering wheel confidently. This is worth testing in a parked car first.
Factors That Slow Healing
Smoking is the single biggest modifiable risk factor for a collarbone that fails to heal. A 2023 analysis found that smokers are nearly four times more likely to develop a nonunion, a fracture that simply stops trying to mend, compared to nonsmokers. This applies specifically to displaced midshaft fractures treated without surgery. If you smoke and break your collarbone, quitting or at least stopping during recovery meaningfully improves your odds.
Other factors that can extend healing time include diabetes, poor nutrition (particularly low vitamin D and calcium), older age, and the severity of displacement. Fractures with multiple fragments or significant soft tissue damage take longer because the body has more rebuilding to do.
Signs the Bone Isn’t Healing Properly
Two complications to watch for are malunion and nonunion. A malunion means the bone healed but in the wrong position, leaving it visibly crooked, shortened, or rotated. You might notice a persistent bump, ongoing pain with use, or weakness when lifting. If the misaligned bone presses on a nerve, you could experience numbness, tingling, or muscle weakness in the arm.
A nonunion means the fracture has stalled entirely. The hallmarks are deep, chronic pain at the fracture site that isn’t improving, limited mobility that plateaus rather than gradually getting better, and sometimes a visible gap or unusual movement where the break is. If you’re past the expected healing window and still experiencing significant pain with normal activities, imaging can determine whether the bone has stopped healing. Both malunion and nonunion are treatable with surgery, but catching them earlier makes correction simpler.
Returning to Sports and Full Activity
Clinical union at 8 to 12 weeks doesn’t mean you’re ready for contact sports or heavy lifting. Most orthopedic guidelines recommend waiting until you have full, pain-free range of motion and near-normal strength before returning to activities that load the shoulder. For non-contact exercise like swimming or light jogging, this often happens around 8 to 10 weeks. Contact sports, heavy weightlifting, and overhead activities like rock climbing typically require 12 weeks or more, and sometimes up to 4 to 6 months depending on the severity of the original fracture.
The key benchmark isn’t a calendar date. It’s function. When you can lift your arm fully overhead without pain, push and pull with confidence, and perform sport-specific movements without guarding or favoring the injured side, you’re ready. Rushing back before these milestones are met risks refracture or compensatory injuries in the shoulder and neck.