Quick Answer: Tendinitis is inflammation of a tendon, typically from overuse or repetitive activity. Mild to moderate cases usually resolve within four to six weeks with relative rest, ice, and physical therapy. Chronic cases or partial tendon tears may take three to six months or longer to fully recover.
Tendinitis is one of the most common overuse injuries seen by orthopedic specialists throughout the Inland Empire and Southern California. The term describes inflammation of a tendon, which is the thick cord of tissue that connects muscle to bone. Virtually any tendon in the body can be affected, but the most common sites are the shoulder (rotator cuff), elbow (tennis elbow and golfer's elbow), wrist, knee (patellar tendon), and the back of the heel (Achilles tendon).
Most people with tendinitis want to know two things: what makes it worse, and how long until it gets better? The answers depend on which tendon is involved and how the condition is managed.
What Causes Tendinitis?
Tendons are designed for repetitive loading, but they have limits. Tendinitis typically develops when the volume or intensity of an activity exceeds what the tendon can handle at that point in time. Common contributing factors include:
- Sudden increases in training volume or intensity, such as adding miles to a running routine too quickly
- Repetitive overhead work, such as painting, tennis, swimming, or throwing sports
- Using equipment improperly or with poor biomechanics
- Returning to activity after a period of rest without adequate reconditioning
- Age-related tendon changes, as tendons lose some elasticity with age and take longer to recover
It is worth noting that newer research has refined the terminology here. Chronic tendon pain that has lasted more than three months and does not show true inflammation on imaging is now more accurately called tendinopathy or tendinosis, which represents degeneration rather than acute inflammation. The distinction matters because anti-inflammatory treatments (like ice and NSAIDs) work well for early tendinitis but are less effective for tendinopathy, which responds better to specific loading exercises.
Common Sites and Their Specific Features
Achilles Tendinitis
The Achilles tendon connects the calf muscles to the heel bone. Achilles tendinitis is extremely common in runners and athletes who do a lot of jumping. The hallmark symptom is pain and stiffness along the back of the heel that is worst first thing in the morning or after a period of rest, then improves with light activity before worsening again with prolonged loading. If left unaddressed, it can progress to a partial or complete Achilles rupture.
Patellar Tendinitis (Jumper's Knee)
The patellar tendon runs from the kneecap (patella) to the shinbone. It is the landing gear for jumping athletes, particularly in basketball, volleyball, and soccer. Pain is felt directly below the kneecap and is aggravated by stairs, squatting, and jumping. This is common in summer sports and worth watching among youth athletes across the Claremont and Pomona Valley sports leagues.
Lateral Epicondylitis (Tennis Elbow)
Tennis elbow is tendinitis of the tendons that attach to the lateral epicondyle, the bony bump on the outside of the elbow. Despite the name, it affects many more people who do not play tennis than those who do. Repetitive wrist extension activities, from typing and mouse use to carpentry and cooking, are common triggers.
Rotator Cuff Tendinitis
The rotator cuff is a group of four tendons surrounding the shoulder joint. Tendinitis here causes pain with overhead movement, difficulty reaching behind the back, and night pain when lying on the affected shoulder. It is common in swimmers, overhead athletes, and workers who perform repetitive lifting.
Treatment: What Works and What Does Not
Initial management of tendinitis follows the PEACE and LOVE framework now recommended by sports medicine researchers. In the first days, Protection, Elevation, and avoiding anti-inflammatories (which may interfere with early healing) are the priorities. After the first week, Load, Optimism, Vascularization, and Exercise become the focus.
What Actually Helps
- Relative rest: Reduce the aggravating activity without stopping all movement entirely. Complete rest often leads to further deconditioning.
- Eccentric loading exercises: Controlled lengthening exercises under load have the strongest research support for tendinitis across all body parts. A physical therapist can prescribe the appropriate program.
- Ice: Helpful for acute symptom management but not a treatment for the underlying problem.
- Corticosteroid injections: Useful for short-term pain relief in appropriate cases, but should be used cautiously as repeated injections can weaken tendon tissue.
- Platelet-rich plasma (PRP): Emerging evidence supports its use in chronic tendinopathy that has not responded to other measures.
Realistic Healing Timelines
Patients at our Claremont office in the Inland Empire frequently ask for a specific timeframe. Here is a realistic range:
- Mild tendinitis with appropriate management: 4 to 6 weeks
- Moderate tendinitis with some ongoing aggravation: 8 to 12 weeks
- Chronic tendinopathy: 3 to 6 months, sometimes longer
- Partial tendon tear with conservative management: 3 to 6 months
The single most important factor in recovery time is consistency with the rehabilitation program. Patients who follow through with eccentric loading exercises and gradually return to activity recover significantly faster than those who only rest.
If you're experiencing tendon pain that has lasted more than a few weeks or is limiting your activities, the team at Garey Orthopedic Medical Group is here to help. We offer same-day and next-day appointments for new patients. Visit gareyortho.com or call us to schedule today.