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Tendinitis, or tendon inflammation, is a painful condition that occurs when tendons—thick bands of connective tissue that attach muscles to bones—become irritated or inflamed. This condition is often caused by repetitive activities or overuse, leading to inflammation, swelling, and pain. Tight muscles can contribute to tendinitis by remaining in a contracted state for extended periods without release, causing the muscles to harden and form painful knots. This is commonly seen in office workers and elderly individuals with inactive lifestyles. Treatment for tendon tightness involves stretching exercises, yoga, and lifestyle modifications to improve flexibility and prevent recurrence. In some cases, medication or injections may be used to relax the muscles and reduce inflammation.
| Characteristics | Values |
|---|---|
| Definition | Tendonitis (tendinitis) is the inflammation of the tendons between your muscles and bones. |
| Causes | Repetitive activities, overuse, sudden movements, incorrect movements, certain medications, and underlying diseases. |
| Symptoms | Pain, swelling, tightness, tenderness, itching, and reduced range of motion. |
| Treatment | Rest, ice, anti-inflammatory medications, corticosteroid injections, physical therapy, eccentric exercises, and surgery in severe cases. |
| Prevention | Warm-up exercises, avoiding repetitive motions, cross-training, maintaining proper posture, taking breaks, and using appropriate equipment. |
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What You'll Learn
Repetitive actions or overuse injuries
Tendonitis, or tendinitis, is the inflammation or irritation of a tendon, which causes it to swell. Tendons are the connective tissues between muscles and bones that help you move. Tendons are made mostly of collagen that is arranged in bundles. Tendinitis can occur in almost any area of the body where a tendon connects a bone to a muscle. The most common places are the base of the thumb, the elbow, the knee, the Achilles tendon, and the shoulder.
Tendinosis/tendinopathy is a similar condition caused by repetitive motions but is more chronic. It is characterised by the degeneration of collagen in a tendon, leading to pain, stiffness, and limited range of motion. Unlike tendinitis, tendinosis does not involve inflammation, although it usually starts with an inflammation that does not fully go away. Over time, the collagen fibres deteriorate, becoming harder, thicker, and more disorganised.
To treat tendinitis caused by repetitive actions or overuse, it is essential to rest and avoid the activity that caused the injury, allowing the tendon to heal fully. This usually takes four to six weeks, depending on the severity of the injury. During this time, it is recommended to continue light exercise to maintain muscle strength and overall fitness. Over-the-counter pain relievers, such as naproxen sodium or ibuprofen, can be taken to reduce pain and inflammation. Icing the tendon and topical pain relievers may also be effective.
In cases of severe or slow-to-heal tendinitis, physical therapy may be required to restore lost strength and range of motion. Physical therapists may employ eccentric exercises, a type of resistance training that emphasises the lowering phase of an exercise, which is thought to help build more collagen in tendons.
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Incorrect movements
Additionally, incorrect movements can also refer to improper posture when working at a desk or performing other tasks. Sitting in the same position for too long without proper posture can contribute to tendinitis. It is important to move around periodically and maintain a correct posture to reduce the risk of developing tendinitis.
To prevent and treat tendinitis, it is crucial to focus on improving flexibility and strengthening the affected muscles. This can be achieved through rehabilitation exercises, stretching, and yoga. Warm-up and cool-down routines are also essential before and after exercising or playing sports. By learning and implementing correct movement techniques, individuals can reduce the risk of developing tendinitis and improve their overall joint health.
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Lack of exercise
Tendonitis (tendinitis) is a condition where the connective tissues between muscles and bones (tendons) inflame, causing pain and tightness in the muscles. Tendons are thick bands of tissue that attach muscles to bones. Their job is to move bones when a muscle tightens or relaxes. Tendinitis is often caused by repetitive activities and can occur in almost any part of the body where a tendon connects a bone to a muscle.
Now, a lack of exercise can lead to muscle stiffness, weakness, and tension. This is because inactivity weakens the muscles, making them vulnerable to injury. When muscles become weakened due to inactivity, one is more likely to experience muscle soreness from everyday activities. This soreness can then develop into muscle tension, causing the muscles to shorten and form tight knots of muscle tissue known as "trigger points". These knots may require massage or trigger point release to reduce muscle tension.
Additionally, a sedentary lifestyle can increase the risk of injuries when one does engage in physical activity. This is because the inactivity has weakened the muscles, making them less adaptable to sudden changes in intensity or frequency of exercise. Dehydration and electrolyte imbalances can also contribute to muscle stiffness and pain, which are more likely to occur when one is inactive.
Therefore, a lack of exercise can lead to muscle weakness and tension, which in turn can cause tendinitis when one suddenly engages in physical activity. The weakened muscles are more susceptible to injury and inflammation, which is what occurs in tendinitis. To prevent this, it is recommended to gradually build up the intensity and frequency of exercise and to stay hydrated to prevent dehydration and electrolyte imbalances. Gentle daily stretching can also help to decrease muscle tension and improve range of motion.
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Calcium deposits
The development of calcific tendonitis typically occurs in three stages. The first is the precalcific stage, where something causes tendon cells to transform into other cells that can act as sites for calcium deposition. This is followed by the two-part "calcific stage", which consists of the formative phase where calcium is deposited, and the resorptive phase where the body begins to break down the calcium deposit. Finally, in the postcalcific stage, the calcium deposits are replaced with healthy tissue, and the tendon heals.
The symptoms of calcific tendonitis can vary depending on the stage of the disease. During the initial formative phase, people rarely experience any symptoms. However, those who do have symptoms may experience intermittent shoulder pain, particularly during forward shoulder flexion, such as lifting the arm in front of the body. In the resorptive phase, many people experience severe acute pain that worsens at night, along with heat and redness at the affected area, as well as a limited range of motion.
Treatment options for calcific tendonitis include non-steroidal anti-inflammatory drugs, rest, and physical therapy. In severe cases, surgery may be necessary to manually remove the calcium deposits. Ultrasound-guided needling, barbotage, and US-PICT (ultrasound percutaneous injection in calcific tendinitis) are also techniques used to dissolve and remove the calcium deposits.
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Certain medications
Drug-induced tendon toxicity is rare but often underestimated. Four main drug classes have been linked to tendinopathies:
- Quinolones/Fluoroquinolone antibiotics: These are synthetic antimicrobials that can cause tendinopathy, regardless of their route of administration and dosage. The French Drug Safety Agency estimated that quinolones accounted for 6.2% of cases. Fluoroquinolones have carried a boxed warning for tendinitis and tendon rupture since 2008.
- Glucocorticoids: Long-term glucocorticoid therapy is a classic cause of iatrogenic tendon rupture.
- Statins: This class of drugs is known to induce potentially severe muscular side effects, such as myopathy and rhabdomyolysis. They have been linked to tendinopathy, with the first cases reported in the early 2000s. The mean time to symptom onset with statins can vary from several months to several years.
- Aromatase inhibitors: These are used in breast cancer treatment and have been linked to tendon damage.
The specific pathophysiological mechanisms responsible for drug-induced tendinopathies are not yet fully understood. However, proven risk factors include age (over 60), pre-existing tendinopathy, and potentiation of toxic effects when multiple drug classes are used together.
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Frequently asked questions
Tendonitis (or tendinitis) is the inflammation of the tendons between your muscles and bones.
Tendonitis is often caused by repetitive activities or overuse, such as running or throwing. It can also be caused by incorrect movements, strain from sudden movements, or as a side effect of certain medications.
Tight muscles can lead to tendonitis when they are left in a contracted state for too long without release. This can cause the muscles to become hardened into painful knots. Tightness and stiffness in the tendons can also cause contraction of the muscles, making them stiffen and become inflexible.
Treatment for tendonitis includes rest, ice, and over-the-counter anti-inflammatory medications. Physical therapy and eccentric exercises are also recommended to improve soft tissue mobility and restore movement.
To prevent tendonitis, it is important to keep physically fit, warm up before exercising, and avoid repetitive motions. Maintaining proper posture and taking breaks from remaining in the same position for too long can also help.
