Tendonitis Symptoms, Joint by Joint

Tendonitis is severe swelling of a tendon, and MedlinePlus sums the symptom up in one line: pain and soreness around a joint. What makes it recognizable is the timing. The pain arrives with the movement that loads the tendon, eases when you stop, and comes back the moment you repeat the motion.

What a tendon is, and what inflames it

A tendon is a flexible band of fibrous tissue anchoring muscle to bone. It transmits force; it is not built to be squeezed, rubbed or loaded a thousand times a day at the same angle. That is exactly what irritates it. MedlinePlus points to repeated injury to an area such as the wrist or ankle as the usual origin, and the NIH adds that tendons become less flexible with age, so the same job hurts more at 55 than it did at 30.

The signs that repeat in every joint

• Pain on use, sharpest in the specific movement that pulls on that tendon
• A dull ache at rest, showing up after the activity rather than during it
• Tenderness to the touch over the tendon itself, not deep inside the joint
• Mild swelling around the area in some cases
• Stiffness or a sense of weakness, often worst in the first minutes of the day

Where it shows up, and what changes

The NIH lists the shoulder, elbow, wrist, hip, knee and ankle as the usual sites. Each one has its own trigger movement and its own tell, which is why “tendon pain” is too vague to act on:

• Shoulder tendonitis symptoms — reaching overhead, and nights
• Tennis elbow symptoms — gripping, shaking hands, turning a wrench
• Wrist tendonitis symptoms — the thumb side, and lifting a baby
• Knee tendonitis symptoms — jumping, stairs, the spot under the kneecap

In the hand and fingers

The hand gets its own named versions. Trigger finger, whose formal name is stenosing tenosynovitis, produces a catching, popping or locking sensation when a finger bends, plus a tender lump at the base of that finger on the palm side. The AAOS notes it is worst after periods of inactivity, which is why people notice it on waking. It clusters in women between 40 and 60 and in people with diabetes or rheumatoid arthritis. De Quervain’s tenosynovitis, on the thumb side of the wrist, is the other common one.

Tendinitis or tendonitis? Both are correct

You will see the condition spelled both ways in American sources — MedlinePlus and the NIH use tendinitis, while tendonitis is what most people type. They are the same diagnosis. Neither spelling implies a different tendon, a different severity or a different treatment.

When to have it examined

Get it looked at if the pain lasts more than a few days, limits a movement you need, keeps getting worse instead of settling, or comes with real swelling and redness. Loss of strength is the signal that deserves the least patience: a tendon that has started to tear behaves differently from one that is only irritated. If the pain is more about pressure on the joint than about movement, compare the picture in tendonitis vs bursitis and in bursitis symptoms.

This content is informational and does not replace a medical consultation, diagnosis, or treatment.