Elbow pain most commonly comes from overuse of the tendons that attach to the bony bumps on either side of the joint. Between 1% and 3% of adults deal with this each year, with the highest rates in people aged 40 to 49. But tendons aren’t the only possibility. Depending on exactly where the pain is, how it started, and what makes it worse, the cause could also be a compressed nerve, inflamed fluid sac, arthritis, or a ligament injury.
Tennis Elbow and Golfer’s Elbow
These are the two most common reasons for elbow pain, and the difference comes down to which side hurts. Tennis elbow (lateral epicondylitis) causes pain on the outer bony bump of your elbow, where the tendons that extend your wrist attach. You’ll typically feel it when gripping, lifting, or twisting your forearm, like turning a doorknob or pouring from a kettle. Despite the name, most people who get it have never picked up a racket. Any repetitive gripping or wrist movement can trigger it, from typing to using hand tools.
Golfer’s elbow (medial epicondylitis) is the mirror image: pain on the inner bony bump, about 5 to 10 millimeters below the point of the bone. It flares up with gripping, throwing, and activities that involve bending your wrist toward your palm or rotating your forearm inward. That rotation movement is actually the most reliable way to distinguish it. Golfer’s elbow is less common than tennis elbow but follows the same basic pattern of tendon overload.
Both conditions develop gradually. The pain often starts as a mild ache during activity and can progress to constant soreness that disrupts sleep or makes it hard to hold a coffee mug. The tendons aren’t usually torn; they’re irritated and sometimes partially degenerated from repeated stress without enough recovery time.
Nerve Compression at the Elbow
If your elbow pain comes with tingling or numbness in your ring and little fingers, the ulnar nerve is the likely culprit. This is the nerve you hit when you bang your “funny bone,” and it runs through a narrow tunnel of muscle, ligament, and bone on the inside of the elbow called the cubital tunnel. When that tunnel gets too tight or the nerve gets irritated from repeated bending, you develop cubital tunnel syndrome.
Symptoms are usually worse when your elbow is bent, which is why many people notice them most at night (sleeping with bent arms) or while holding a phone. Over time, the numbness can become constant, and you may notice weakness in your grip or difficulty with fine motor tasks like buttoning a shirt. The pain itself tends to radiate from the inner elbow down into the forearm and hand rather than staying localized at the joint.
Elbow Bursitis
A noticeable, squishy swelling on the point of your elbow, right over the bony tip, points to olecranon bursitis. There’s a thin, fluid-filled sac at the back of the elbow that cushions the bone against the skin, and it can become inflamed from repeated pressure (leaning on desks, for example), a direct blow, or infection.
The swelling is often the most obvious feature. It can feel like a small water balloon sitting on the tip of your elbow. In non-infected cases, the swelling may actually be painless, and your range of motion stays normal. If the area is warm, red, and tender, or if you have a fever, that suggests the bursa may be infected, which is a situation that needs prompt medical attention. Infected bursitis can also develop from a cut or scrape near the elbow that lets bacteria in.
Arthritis in the Elbow
Arthritis is a less common cause of elbow pain than tendon problems, but it does happen. Osteoarthritis in the elbow typically affects people who have a history of heavy manual labor or prior elbow injuries. The cartilage wears down over time, leading to stiffness, a grating sensation during movement, and pain that worsens with activity. You may notice that you can’t fully straighten or bend your arm the way you used to.
Rheumatoid arthritis is a different process entirely. It’s an autoimmune condition where the body’s immune system attacks the joint lining. One study comparing elbows in people with rheumatoid arthritis to those without found joint fluid accumulation in about 55% of affected elbows versus only 7% of healthy ones. RA usually affects multiple joints (often the hands and wrists first), so elbow pain from RA rarely appears in isolation. If it does, other inflammatory conditions need to be ruled out. Symptoms that last six weeks or longer, along with swelling in other joints, are a pattern worth having evaluated.
Ligament Injuries
The ulnar collateral ligament (UCL) runs along the inner side of the elbow and is most commonly injured in throwing athletes, particularly baseball pitchers. An acute tear can produce an audible pop with immediate, sharp pain that makes it impossible to continue throwing. But UCL injuries can also develop gradually. In that case, the pain starts out mild and only shows up during hard or prolonged throwing. Over time it can persist at rest and stop responding to ice and over-the-counter pain relievers.
Because the ulnar nerve runs right next to this ligament, a UCL injury can also cause tingling or numbness in the ring and little fingers, which can make it tricky to tell apart from cubital tunnel syndrome without imaging. If you’re an overhead athlete with inner elbow pain and a sense of looseness or instability in the joint, a ligament issue is worth considering.
What the Location Tells You
- Outer elbow: Most likely tennis elbow, especially if gripping or lifting makes it worse.
- Inner elbow: Could be golfer’s elbow, a UCL issue, or cubital tunnel syndrome. Numbness in the fingers points toward the nerve; pain with throwing points toward the ligament; pain with gripping and wrist flexion suggests the tendon.
- Back of the elbow (the point): Bursitis if there’s visible swelling; a stress fracture in rare cases.
- Deep inside the joint: Arthritis or a loose body (a small fragment of bone or cartilage floating in the joint).
- Diffuse pain with stiffness: Arthritis, especially if the elbow has lost range of motion over time.
Managing Elbow Pain at Home
For most overuse-related elbow pain, the first step is reducing the activity that’s causing the problem. Complete immobilization isn’t necessary or helpful for tendons, but cutting back on the aggravating movement is. Ice can help with pain in the first day or two of a flare-up: apply it with a cloth barrier for 10 to 20 minutes at a time, every hour or two, but only within the first eight hours or so of acute pain. After that initial window, ice can actually slow healing.
If there’s swelling, gentle compression with an elastic bandage can help control it. Wrap snugly but not tightly. If you notice numbness or tingling below the wrap, it’s too tight. Keeping the elbow elevated above heart level when resting also reduces swelling.
For tendon pain that lingers, eccentric exercises are the most evidence-supported home rehabilitation strategy. These involve slowly lowering a weight rather than lifting it, which strengthens the tendon under controlled stress. A classic version for tennis elbow: rest your forearm on a table with your hand hanging off the edge, palm facing down, holding a light weight (about 30% of the heaviest weight you could hold). Use your other hand to lift the weight up by bending your wrist back, then slowly lower it under control. Do 10 to 15 repetitions, three sets, ideally three times a day. A 12-week program of daily eccentric exercise is considered the first-line approach for tendon pain that isn’t improving on its own.
Signs That Need Medical Attention
Most elbow pain from overuse will improve with rest and gradual rehabilitation over several weeks. But certain signs suggest something more serious is going on. You should seek care if you can’t move or bend your arm, if there’s severe swelling or bruising, if you notice nerve symptoms like persistent numbness or weakness in your hand, or if the pain doesn’t improve after a few weeks of home care. In children, elbow pain always warrants evaluation because their growing bones are vulnerable to injuries that don’t occur in adults. A hot, red, swollen elbow with fever raises concern for infection and should be seen urgently.