Tendinitis

Tendinitis is inflammation of a tendon, typically caused by an acute overload or sudden increase in activity that irritates the tendon tissue before it has had time to adapt.

What tendinitis involves and how it differs from tendinosis

Tendinitis refers specifically to tendon inflammation — the kind that happens in the early stages of overuse, after an acute injury, or when activity increases too quickly for the tendon to keep up. It's characterized by pain, localized tenderness, and sometimes swelling around the affected tendon. Common sites include the Achilles tendon, the patellar tendon, the rotator cuff tendons, and the tendons at the elbow (tennis elbow and golfer's elbow).

True inflammatory tendinitis tends to respond well to activity modification, targeted loading, and time. It's worth distinguishing from tendinosis — a degenerative condition involving disorganized tendon tissue without significant inflammation — because the two conditions respond to different treatment approaches. Many cases labeled as tendinitis in practice are actually tendinosis, which is why treatment designed for inflammation doesn't always produce the expected results.

Why tendinitis doesn't always respond to rest and anti-inflammatories

Rest reduces load on the tendon, and anti-inflammatory measures can quiet acute symptoms — but neither rebuilds the tendon's capacity to handle activity. When tendinitis recurs repeatedly, it's usually a sign that the tendon hasn't been progressively loaded and strengthened to the point where it can manage the demands being placed on it. That's what physical therapy addresses.

Why tendon pain needs loading, not just rest

Gradually increasing load can be more effective than rest for restoring tendon health and preventing recurrence. A physical therapist can determine your current tendon capacity and guide a loading program that builds it progressively without re-aggravating the tissue.

How Sword Health can help

A physical therapist can assess whether your tendon pain reflects inflammation, degeneration, or a combination of both, and design a rehabilitation program that matches what's actually happening in the tissue. Sword makes that specialist-level care available from home, so you can start building tendon capacity instead of just managing pain.