Joint pain can show up in a knee, hip, shoulder, wrist, or almost anywhere else the body bends, and the cause behind it varies just as widely. Some joint pain comes from years of gradual wear, some from a single injury, and some from the immune system itself. Because the right treatment depends entirely on the underlying cause, here are the five causes we see most often, ranked by how frequently they bring patients into our clinics, along with how each one is typically treated.
What it is: The most common cause of joint pain by far, osteoarthritis develops as the cartilage cushioning a joint gradually wears down over time, leading to friction, stiffness, and inflammation.
Quick signs: Stiffness that's worse in the morning or after sitting, pain that increases with activity, and a gradual onset over months or years rather than a sudden injury.
Where it shows up most: Knees, hips, hands, and the spine, though it can affect nearly any joint.
Typical treatment path: Activity modification and physical therapy come first, followed by anti-inflammatory medication for flare-ups. For more persistent cases, joint injections such as corticosteroids or hyaluronic acid (viscosupplementation), along with regenerative options like PRP, can meaningfully reduce pain and delay or avoid the need for joint replacement.
What it is: Unlike osteoarthritis, rheumatoid arthritis is an autoimmune condition in which the body's immune system mistakenly attacks the lining of the joints, causing inflammation and, over time, joint damage.
Quick signs: Pain and swelling in multiple joints at once, often symmetrically (both hands or both knees), along with morning stiffness that lasts 30 minutes or longer.
Where it shows up most: Hands, wrists, and feet are common starting points, though it can spread to larger joints as it progresses.
Typical treatment path: This is one of the few causes of joint pain where a rheumatologist, not an orthopedic or interventional pain specialist, is usually the right first call, since managing the underlying autoimmune process (often with disease-modifying medication) is central to treatment. Pain management can still play a supporting role for joint-specific symptoms once the systemic condition is being managed.
What it is: Bursitis is inflammation of the small fluid-filled sacs (bursae) that cushion joints, while tendinitis is inflammation of a tendon. Both are usually caused by repetitive motion or overuse rather than a single traumatic injury.
Quick signs: Localized, often sharp pain that worsens with specific movements, sometimes with mild swelling or warmth directly over the affected area.
Where it shows up most: Shoulders (rotator cuff tendinitis), elbows (tennis or golfer's elbow), hips, and knees.
Typical treatment path: Rest, activity modification, and physical therapy resolve many cases. When pain persists, targeted joint injections can calm inflammation quickly, often allowing patients to return to physical therapy and normal activity faster than rest alone.
What it is: An acute injury, a twisted knee, a fall, a sports collision, can tear or strain the ligaments, meniscus, or tendons that stabilize a joint, causing pain that's usually sudden rather than gradual.
Quick signs: Pain that started at a specific moment, often with swelling, bruising, or a feeling of instability, locking, or giving way in the joint.
Where it shows up most: Knees (ACL and meniscus tears), shoulders (rotator cuff and labral tears), and ankles.
Typical treatment path: Many partial tears and soft-tissue injuries respond well to physical therapy combined with joint injections or regenerative therapies like PRP. Complete tears or injuries causing significant instability may need a surgical evaluation, which is why an accurate diagnosis, often confirmed with imaging, matters so much with this category.
What it is: Gout occurs when uric acid crystals build up in a joint, triggering sudden, intense inflammation. It's one of the few causes of joint pain that can come on within hours.
Quick signs: Sudden, severe pain, redness, warmth, and swelling, often in a single joint, classically the big toe, though it can affect other joints too.
Where it shows up most: The big toe is the classic location, but ankles, knees, and other joints can be affected.
Typical treatment path: Acute flares are managed with anti-inflammatory medication, while longer-term management focuses on lowering uric acid levels through medication and dietary changes, usually coordinated with a primary care physician or rheumatologist. Interventional treatment plays a smaller role here than with mechanical causes of joint pain.
Joint pain" describes a symptom, not a diagnosis, and treating the wrong cause, even with a reasonable-sounding treatment, rarely provides lasting relief. A joint that's stiff from osteoarthritis, inflamed from an autoimmune condition, and unstable from a torn ligament can all feel similar at first glance, which is exactly why imaging, exam findings, and sometimes diagnostic injections matter before committing to a treatment plan.
Across our four Southern California locations, our approach starts with pinpointing the exact cause of your joint pain before recommending treatment. Patients choose us for:
If your joint pain is specifically in the knee, our dedicated guide on what kind of doctor treats knee pain walks through that decision in more detail.
How can I tell if my joint pain is arthritis or an injury?
Arthritis-related joint pain typically develops gradually and is worse with prolonged activity or first thing in the morning, while injury-related pain usually starts at a specific moment, often with swelling or instability. An exam and imaging can confirm which pattern fits your situation.
Is joint pain always a sign of arthritis?
No. While arthritis is the most common cause overall, joint pain can also come from tendinitis, bursitis, an acute injury, or, less commonly, gout or an autoimmune condition. The pattern and location of your pain help narrow down the cause.
Can joint pain be treated without surgery?
In most cases, yes. Osteoarthritis, tendinitis, bursitis, and many soft-tissue injuries respond well to physical therapy, activity modification, and targeted injections. Surgery is generally reserved for cases involving significant structural damage that hasn't responded to non-surgical treatment.
When should I see a specialist for joint pain?
See a specialist if your pain has lasted more than a few weeks, is limiting your daily activities, involves significant swelling or instability, or hasn't improved with rest and basic home care. Sudden, severe joint pain, especially with redness and warmth, should be evaluated promptly.
Do I need imaging before my first joint pain appointment?
Not necessarily. Your specialist can often begin with a physical exam and order or review imaging as part of your evaluation rather than requiring it beforehand.
Complete our online form to request an appointment at any of our four Southern California locations.
Or Call (833) 476-7377
.jpg)
