Tendinosis

Tendinosis is a chronic (long-lasting) condition where a tendon breaks down over time. Tendons are strong, cord-like tissues that connect muscles to bones. Unlike tendinitis, which is inflammation, tendinosis involves tiny tears and degeneration within the tendon, often due to overuse or repetitive strain, leading to persistent pain and stiffness.

What is Tendinosis?

Tendinosis is a chronic condition involving the breakdown and degeneration of a tendon, which is the strong, fibrous tissue connecting muscle to bone. Unlike tendinitis, which is primarily inflammation, tendinosis involves changes at the cellular level, including tiny tears and a disorganized structure within the tendon, often without significant inflammation. This leads to persistent pain and reduced function.

Tendinosis is a common cause of pain in many parts of the body, including the elbow, shoulder, hip, knee, and Achilles tendon in the heel (Mayo Clinic). It develops gradually over time, often due to repeated stress or injury that does not allow the tendon to heal properly (MedlinePlus). The condition involves a change in the tendon's structure, where collagen fibers, which give the tendon its strength, become disorganized and weakened (Mayo Clinic). This degeneration means the tendon loses its smooth, parallel structure and can become thickened and less flexible (MedlinePlus). The body attempts to repair the damage, but often the repair process is not effective enough to keep up with the ongoing stress (Mayo Clinic). This leads to a cycle of damage and incomplete healing, resulting in chronic pain and tenderness in the affected area (MedlinePlus). It is important to distinguish tendinosis from tendinitis. Tendinitis refers to short-term inflammation of a tendon, often from an acute injury (Mayo Clinic). Tendinosis, however, is a long-term problem involving degeneration, and inflammation is usually not the main issue (MedlinePlus). Treatments for tendinosis focus on healing and strengthening the tendon, rather than just reducing inflammation (Mayo Clinic).

Symptoms

The main symptom of tendinosis is persistent pain that worsens with activity and improves with rest. You might also notice tenderness when touching the affected tendon, stiffness, and a reduced range of motion in the nearby joint. Sometimes, a lump or thickening can be felt along the tendon.

Pain from tendinosis often starts as a mild ache and gradually becomes more severe and constant (MedlinePlus). This pain is typically localized to the affected tendon and the area around it (Mayo Clinic). For example, if you have Achilles tendinosis, you might feel pain in the back of your heel or calf (MedlinePlus). The pain usually gets worse when you use the affected muscle or joint, especially during activities that involve repetitive movements (Mayo Clinic). For instance, a tennis player with elbow tendinosis (tennis elbow) might feel pain when gripping a racket (MedlinePlus). Rest often helps to lessen the pain, but it may return once activity resumes (Mayo Clinic). Other common symptoms include stiffness in the affected joint, particularly in the morning or after periods of inactivity (MedlinePlus). You might also experience weakness in the affected limb or difficulty performing everyday tasks (Mayo Clinic). In some cases, you might feel a grating or crackling sensation when moving the tendon, or notice a visible lump or thickening along the tendon (MedlinePlus).

Causes & risk factors

Tendinosis is primarily caused by repetitive strain or overuse of a tendon, leading to tiny tears and degeneration over time. Risk factors include aging, as tendons naturally weaken with age, and certain activities like sports or jobs that involve repetitive motions. Poor technique, sudden increases in activity, and certain medical conditions can also contribute.

The most common cause of tendinosis is repeated microtrauma to a tendon without enough time for healing (MedlinePlus). This often happens during activities that involve the same movements over and over, such as certain sports like running, tennis, or golf, or jobs that require repetitive tasks (Mayo Clinic). For example, a painter who repeatedly lifts their arm might develop shoulder tendinosis (MedlinePlus). Several factors can increase your risk of developing tendinosis. Age is a significant risk factor, as tendons naturally lose some of their elasticity and strength as you get older, making them more prone to injury and degeneration (Mayo Clinic). People over 40 are more commonly affected (MedlinePlus). Other risk factors include poor posture, improper technique during sports or work activities, and sudden increases in the intensity or duration of physical activity (Mayo Clinic). Certain medical conditions, such as diabetes or rheumatoid arthritis, can also affect tendon health and increase the risk of tendinosis (MedlinePlus). Some medications, like fluoroquinolone antibiotics, have been linked to an increased risk of tendon problems (Mayo Clinic).

How it's diagnosed

Tendinosis is typically diagnosed through a physical examination and a review of your medical history. Your doctor will ask about your symptoms, activities, and any past injuries. During the exam, they will check for tenderness, swelling, and your range of motion. Imaging tests, such as ultrasound or MRI, may be used to confirm the diagnosis and assess the extent of tendon damage.

When you see a doctor for suspected tendinosis, they will first take a detailed medical history (Mayo Clinic). This includes asking about when your pain started, what activities make it worse, and any previous injuries or medical conditions you have (MedlinePlus). They will also want to know about your occupation, hobbies, and exercise routine to identify potential repetitive stressors (Mayo Clinic). During the physical examination, your doctor will carefully inspect and feel the affected area to pinpoint the exact location of pain and tenderness (MedlinePlus). They will also assess your range of motion and strength in the affected joint and limb (Mayo Clinic). Sometimes, specific movements or tests can help confirm which tendon is affected (MedlinePlus). While a physical exam is often enough for diagnosis, imaging tests can provide more detailed information. An ultrasound can show changes in the tendon's structure, such as thickening or small tears (Mayo Clinic). Magnetic resonance imaging (MRI) can offer a more comprehensive view of the tendon and surrounding tissues, helping to rule out other conditions and assess the severity of the degeneration (MedlinePlus). X-rays are generally not useful for diagnosing tendinosis itself, but they can help rule out bone problems (Mayo Clinic).

Treatment options

Treatment for tendinosis focuses on reducing pain, promoting tendon healing, and restoring function. Initial steps often include rest, applying ice, and modifying activities to avoid aggravating the tendon. Physical therapy is a cornerstone of treatment, involving specific exercises to strengthen the tendon and surrounding muscles. Other options may include bracing, medication for pain, or, in some cases, injections or surgery.

The first step in treating tendinosis is often to rest the affected tendon and avoid activities that worsen the pain (MedlinePlus). Applying ice to the area for 15-20 minutes several times a day can help manage discomfort (Mayo Clinic). It is also important to modify or stop activities that caused the tendinosis in the first place, allowing the tendon a chance to heal (MedlinePlus). Physical therapy plays a crucial role in recovery. A physical therapist can teach you specific exercises designed to gradually strengthen the tendon and the muscles around it (Mayo Clinic). These exercises often involve eccentric loading, where the muscle lengthens under tension, which has been shown to be effective in promoting tendon repair (Cochrane Library). The therapist can also help improve your posture, movement mechanics, and technique for sports or work activities to prevent future injury (MedlinePlus). Over-the-counter pain relievers, such as ibuprofen or naproxen, may be used to manage pain, though they primarily address symptoms rather than the underlying tendon degeneration (Mayo Clinic). In some cases, your doctor might recommend a brace or splint to support the tendon and limit movement (MedlinePlus). For persistent symptoms, injections like corticosteroid injections are sometimes used, but their long-term effectiveness for tendinosis is debated, and they may even weaken the tendon over time (Mayo Clinic, Cochrane Library). Platelet-rich plasma (PRP) injections are an emerging treatment, but more research is needed to confirm their effectiveness (Mayo Clinic). Surgery is typically a last resort for severe cases that do not respond to other treatments (MedlinePlus).

Recovery & outlook

Recovery from tendinosis can be a long process, often taking several months to a year, as tendon healing is slow. The outlook is generally good with consistent treatment and activity modification, but it requires patience and adherence to physical therapy. Preventing recurrence involves gradually returning to activity, using proper technique, and continuing strengthening exercises to maintain tendon health.

Healing from tendinosis takes time because tendons have a limited blood supply, which slows down the repair process (Mayo Clinic). It is common for recovery to span several months, and in some cases, it can take up to a year or more for the tendon to fully heal and regain its strength (MedlinePlus). Patience and consistent effort with your treatment plan are essential for a successful recovery (Mayo Clinic). The outlook for most people with tendinosis is positive, especially if the condition is addressed early and treatment is followed diligently (MedlinePlus). Many people experience significant improvement in pain and function through conservative treatments like physical therapy and activity modification (Cochrane Library). However, if the underlying causes, such as repetitive strain or poor technique, are not addressed, the condition may return (Mayo Clinic). To prevent tendinosis from recurring, it is important to gradually increase the intensity and duration of physical activities (MedlinePlus). Always warm up before exercise and cool down afterward (Mayo Clinic). Continuing with strengthening and flexibility exercises, even after pain subsides, helps maintain tendon health (MedlinePlus). Paying attention to proper form and technique during sports or work tasks can also significantly reduce the risk of future tendon degeneration (Mayo Clinic).

When to see a doctor

You should see a doctor if you experience persistent tendon pain that does not improve with rest and self-care within a few days, or if the pain interferes with your daily activities. Seek immediate medical attention if you experience sudden, severe pain, especially if it's accompanied by a popping or snapping sensation, significant swelling, or an inability to move the affected joint, as these could indicate a tendon rupture.

It is advisable to consult a healthcare professional if your tendon pain lasts for more than a few days, even after trying rest, ice, and over-the-counter pain relievers (MedlinePlus). You should also see a doctor if the pain is severe enough to limit your ability to perform everyday tasks, work, or participate in your usual activities (Mayo Clinic). Early diagnosis and treatment can help prevent the condition from becoming chronic and more difficult to manage (MedlinePlus). Certain signs and symptoms warrant immediate medical attention, as they could indicate a more serious injury, such as a complete tendon rupture (Mayo Clinic). These red flags include a sudden, sharp, and severe pain in the area of a tendon, often described as feeling like you were hit or heard a "pop" or "snap" (MedlinePlus). Other urgent signs include significant swelling or bruising around the tendon, a visible deformity, or an inability to move the affected limb or bear weight on it (Mayo Clinic). If you experience any of these symptoms, it is crucial to seek emergency care to get a proper diagnosis and prevent further damage (MedlinePlus).

Frequently asked questions

Is tendinosis the same as tendinitis?

No, tendinosis and tendinitis are different. Tendinitis refers to short-term inflammation of a tendon, usually from an acute injury. Tendinosis, however, is a chronic condition involving the degeneration and breakdown of the tendon tissue itself, often without significant inflammation.

Can tendinosis heal on its own?

Tendinosis rarely heals completely on its own without intervention. While rest can temporarily reduce pain, the underlying degeneration often requires specific treatments like physical therapy and activity modification to promote proper healing and prevent the condition from worsening.

How long does it take to recover from tendinosis?

Recovery from tendinosis can take a long time, often several months to a year or more. This is because tendons have a limited blood supply, which slows down the healing process. Consistent adherence to treatment, especially physical therapy, is key for a successful recovery.

What kind of exercises are best for tendinosis?

Physical therapy exercises, particularly those involving eccentric loading, are often recommended for tendinosis. These exercises strengthen the tendon by lengthening the muscle under tension. A physical therapist can design a safe and effective exercise program tailored to your specific condition.

Can diet affect tendinosis?

While no specific diet directly treats tendinosis, a balanced diet rich in nutrients can support overall tissue health and healing. Ensuring adequate protein intake and consuming foods rich in vitamins and minerals may help the body's repair processes.

Is surgery often needed for tendinosis?

Surgery for tendinosis is generally considered a last resort. Most cases respond well to conservative treatments like rest, physical therapy, and activity modification. Surgery is usually reserved for severe, chronic cases that have not improved after many months of other treatments.

Sources

• MedlinePlus — Tendinosis
• Mayo Clinic — Tendinosis
• Cochrane Library — Tendinosis