Arthritis After an Injury: When an Old Accident Comes Back to the Joint

Arthritis after an injury, called post-traumatic arthritis, is joint wear that starts with a fracture, a ligament tear or a meniscus tear. It can show up years after a crash, fall or work accident. Treatment starts with strength, weight and load changes. Platelet-rich plasma (PRP) is one option to calm the joint and delay a replacement.

Post-traumatic arthritis hits people young. The usual arthritis patient is in their 60s or 70s. The person whose knee or ankle was hurt at 30 can be in trouble by 45. That person is often told they are too young for a new joint and too damaged for anything else. So they wait, on pills, while the joint gets worse. That waiting room is exactly where the most can still be done.

How does an injury lead to arthritis years later?

A joint is a smooth surface, a cushion and a set of ligaments that keep it lined up. An injury can damage any of the three.

• A fracture into the joint leaves a step in the surface. The step wears like a pothole.
• A torn ligament lets the joint slide a little with every step. Small slides add up to big wear.
• A torn or trimmed meniscus takes away part of the knee’s shock absorber.

Then the chemistry follows. An injured joint stays inflamed long after the bruise is gone. That inflammation breaks down cartilage slowly. People with a meniscus tear, or an ACL and meniscus tear together, have about six times the odds of knee arthritis compared with an uninjured knee. With an ACL tear alone, the odds are about four times higher.

How common is post-traumatic arthritis?

More common than most people think. Researchers at the University of Iowa estimated that about 12% of all symptomatic arthritis in the hip, knee and ankle starts with an injury. That is around 5.6 million people in the United States.

If you were hurt in an accident, it is worth knowing this risk early. The joint may feel fine a year later and still be heading somewhere. Your records from the time of the injury are what connect that later wear to the event, as our page on proving causation explains.

Which joints get arthritis after an injury?

Any joint that was hurt can wear early. The knee is the most common, because it takes the most load and the most twisting. The ankle is next, often after a bad sprain or a broken ankle that healed a little out of line. The hip can follow a fall or a dashboard injury in a crash. The shoulder, wrist and thumb base can follow a fall on an outstretched hand.

The early signs are easy to wave off. The joint is stiff in the morning. It aches after a long day on your feet. It swells a little after activity and settles overnight. It clicks or grinds. If that joint was hurt before, those signs mean it is time for an exam, not more waiting.

What are the treatment options before a joint replacement?

The base of every plan is the same, and it is not glamorous:

• Strength. Strong thigh and hip muscles take load off the knee. Strong calf muscles protect the ankle.
• Weight and blood sugar. Every pound of body weight puts several pounds of force through the knee on stairs. High blood sugar and inflammation also slow repair inside the joint.
• Load changes. A brace, a different shoe, a cane in the opposite hand on bad days.
• Short bursts of medicine when the joint flares, not a daily habit for years.

Cortisone can settle a flare. Used again and again, it trades short relief for faster wear. Hyaluronic acid has a place for some knees. Joint replacement is a good operation for the right person at the right time. The goal is to make sure that time is chosen, not forced.

Where does PRP fit for arthritis after an injury?

PRP is concentrated platelets from your own blood, placed back into the joint. It calms joint inflammation and supports the tissue that is left. For knee arthritis, it now has formal backing. In 2024, the ESSKA-ICRS consensus rated PRP appropriate in many scenarios for people up to age 80 with mild to moderate wear, especially after other care or other injections failed. In 2026, the American Academy of Physical Medicine and Rehabilitation issued its own guidance statement on PRP for knee arthritis.

Dose matters. A 2025 review found that the gain from PRP for knee arthritis was clinically meaningful, and that higher platelet concentrations did better. So we measure what we deliver. We place it under ultrasound. You stay awake with local anesthetic and most people drive home. The joint may ache for about 48 hours. The number of injections depends on how the joint responds.

For a joint with more advanced wear, bone marrow concentrate or an injection into the bone under the cartilage is sometimes discussed. Hip PRP is also a service here. Our knee guideline page goes deeper on wear grades and what each guideline says.

What does this mean for a future-care claim?

If your arthritis traces back to an accident, the cost of treating it later is part of that injury. A claim that settles before anyone has thought about the joint ten years out has left that cost on the table. A clear record of the original injury, the imaging and the plan is what protects you. We cover that record in documenting orthobiologic care for a claim. Most health plans do not cover PRP; HSA and FSA funds can generally be used.

Related reading: knee injury at work, why metabolic terrain comes before an orthobiologic and what the guidelines say after an injury.

All orthobiologic care: Our orthobiologics and PRP injections page lists every injury we treat with PRP, bone marrow concentrate and microfragmented fat.

Frequently asked questions

Can a joint injury cause arthritis years later?

Yes. Fractures into the joint, ligament tears and meniscus tears all raise the risk. The wear can take five to twenty years to show on an X-ray.

Is post-traumatic arthritis different from regular arthritis?

It looks similar on an X-ray. The difference is the cause and the age. It starts with an injury and often affects people decades younger than typical arthritis.

Am I too young for a knee replacement?

Younger patients wear out replacements sooner and may need a second surgery. That is why the years before a replacement matter, and why building strength and using options like PRP make sense in that window.

How long does PRP last in an arthritic joint?

It varies with the joint, the wear grade, the dose delivered and the rehab after it. Many people report relief for months to a year or more. Some need it repeated, based on how the joint responds.

Does arthritis after an accident count in my injury claim?

It can, if the record connects the arthritis to the injury. Imaging from the time of the accident and a clear history of how the joint worked before are what make that link.

Where is Injury Experts located?

Accident and Injury Experts is at 4477 Woodson Rd, Suite 202, St. Louis, MO 63134, next to Lambert International Airport, with parking at the door. Call (314) 887-5866. Directions and hours are on our contact page.

Medically reviewed by Dr. Gurpreet Singh Padda, MD, MBA, MHP. Board Certified in Anesthesiology, Pain Medicine, Interventional Pain Management, Addiction Medicine, and Obesity Medicine. Last reviewed October 3, 2026.