14 Usual Causes of Bursitis

2. Joint Stresses

A bursa is a small fluid-filled sac that cushions areas where bones, muscles, and tendons meet. It reduces friction and helps joints move smoothly. Repeated pressure or rubbing in the same area can irritate the bursa, making it swollen and painful.

Everyday habits such as leaning on elbows for long periods, kneeling on hard floors, or standing for many hours place steady pressure on certain joints. Over time, this strain can lead to bursitis in areas such as the elbow, knee, or hip. Repetitive movements from jobs or sports that require the same motion each day can also increase friction around a joint.

Frequent lifting, throwing, or squatting may place extra strain on the shoulder or knee, further inflaming the nearby bursa. Body weight adds another source of stress. The hips, knees, and ankles must support more force with each step when a person carries excess weight. Poor posture can also alter how pressure spreads across a joint.

Uneven standing or slouching shifts force to areas not designed to handle it. Over time, the combined effects of repeated pressure, repetitive motion, excess body weight, and poor posture can cause small injuries that gradually develop into bursitis.

3. Improper Inflammatory Treatments

Improper treatment of joint inflammation can worsen bursitis or make it harder to heal. When swelling develops around a joint, the nearby bursa may become irritated. If the underlying cause is not addressed, inflammation can continue, slowing recovery. Some people ignore early symptoms and delay care, continuing the same activity that stressed the joint.

Others rely mainly on pain relief, such as nonsteroidal anti-inflammatory drugs. While these medicines reduce pain and swelling, they do not remove the pressure or friction affecting the joint. If overuse continues, inflammation can return quickly and using heat during the early stages of swelling may also worsen the condition.

Heat increases blood flow and may worsen swelling during the first few days. Cold therapy is often better during this stage because it helps reduce inflammation. In some cases, steroid injections are used too often. Corticosteroids can lower swelling, but repeated injections in the same area may weaken nearby tendons and raise the risk of joint injury.

4. Repetitive Strain

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The bursa acts as a small cushion between bone and surrounding soft tissues such as muscles and tendons. It helps reduce friction and allows joints to move smoothly during daily activities. When a joint repeats the same motion many times over a long period, friction around the bursa gradually increases and may cause irritation and swelling.

This irritation can lead to inflammation, which often causes pain and stiffness in the affected joint. Many daily tasks create this type of repeated strain. Jobs that involve lifting, reaching, typing, or using hand tools often place ongoing stress on the same joint. Certain sports, including tennis, running, or baseball, can also strain areas such as the shoulder, elbow, knee, or hip. Symptoms may appear after a sudden increase in activity.

Starting a new workout routine or training for a long race can overload a joint before the body has time to adjust. Even mild but repeated pressure, such as leaning on the elbows at a desk for long periods, can also irritate the nearby bursa. Poor posture or weak muscles may add extra stress to the joint and increase the risk of bursitis.

5. Previous Breaks or Fractures

A past bone break can change how a joint moves and bears weight. When a bone heals, it may not return to its exact original shape, and even small changes in alignment can affect how force spreads across the joint during movement.

A bursa sits between bone, tendon, and muscle to reduce friction. If a fracture heals with a slight bump or uneven surface, the nearby bursa may rub more as the joint moves. Over time, this repeated friction can irritate the bursa and cause swelling. Scar tissue may also form after a fracture. This can limit smooth movement around the joint and make surrounding structures less flexible, which adds pressure to the bursa during daily activity. Muscles around the joint may also become weak or tight after a fracture.

If rehabilitation does not fully restore strength and flexibility, extra strain can develop during movement and increase the risk of bursa irritation. Surgical repair may further affect joint movement. In some cases, metal plates or screws remain in place and slightly change how soft tissues rest around the joint. Because of these changes, fractures near the shoulder, elbow, hip, or knee may raise the chance of bursitis in those areas.

6. Degenerative Spinal Conditions

Degenerative spinal conditions can increase the risk of bursitis, especially around the lower back and hips. These conditions include disc wear, spinal stenosis, and other age-related joint changes. As the spine ages, the discs gradually lose water and become thinner, which reduces their ability to cushion normal movement.

When the spine provides less support, nearby joints and soft tissues must absorb more mechanical load. This added strain affects structures around the hips and pelvis, including the bursae that reduce friction between bone and soft tissue. Over time, repeated stress may irritate these bursae and cause swelling. As discomfort develops, people with chronic low back problems often change how they stand, walk, or sit to reduce pain.

These posture changes can shift body weight unevenly across the hips and place extra pressure on bursae near the outer hip. Inflamed bursae in this area can cause pain along the outer thigh or buttock. The discomfort may spread down the leg and often feels worse when lying on one side or placing pressure on the hip.

7. An Array of Bone-Related Conditions

Several bone and joint disorders can raise the risk of bursitis because they change how joints move and how weight is distributed across them. These changes can place extra stress on nearby bursae and lead to irritation. Inflammatory joint diseases are one common cause. Rheumatoid arthritis produces long-term inflammation inside the joint, and this swelling may extend to nearby bursae, causing pain, warmth, and fluid buildup.

Crystal-related conditions such as gout can also contribute. In gout, sharp uric acid crystals collect inside a joint and irritate surrounding tissues, which may trigger sudden bursa inflammation with pain and redness. Degenerative joint changes create another pathway. As cartilage gradually wears down with age, bones may rub more during movement. This added friction can stress the bursa, especially in joints such as the shoulder, hip, or knee.

Bone shape or alignment differences may also increase risk by concentrating pressure on certain parts of a joint over time. In rare cases, infection may affect the bursa along with nearby bone or skin. This type of bursitis often causes stronger pain, swelling, and warmth and usually requires antibiotics or other medical care to control the infection.

8. Ineffective Treatments

Some treatments fail because they do not address the true cause of bursitis. When irritation, pressure, or infection continues, the bursa may stay inflamed and symptoms can persist. One common mistake is continuing the activity that first irritated the joint. Many people try to push through the pain and repeat the same movements that stress the area. This repeated strain prevents the bursa from healing and allows inflammation to continue.

Certain home treatments may also worsen symptoms if used at the wrong stage. Heat therapy during the early phase of swelling can increase blood flow and make the area more swollen. Ice is usually more helpful during the first few days because it helps limit inflammation. Direct pressure on the swollen area can also aggravate the condition, and massage over an inflamed bursa may increase irritation instead of easing discomfort.

Too much rest can also delay recovery. If a joint remains inactive for long periods, stiffness and muscle weakness may develop. Repeated drainage of bursal fluid without a clear medical reason may also irritate the area or increase the risk of infection.

9. Other Types of Arthritis

Several forms of arthritis can raise the risk of bursitis because they create long-term joint inflammation or increase friction during movement. These changes can irritate nearby bursae and lead to swelling and inflammatory arthritis is one major pathway.

Rheumatoid arthritis is an autoimmune disease in which the immune system attacks the lining of the joints. This causes swelling, warmth, and pain that may spread to nearby bursae. Psoriatic arthritis develops through a similar immune-related process. It affects some people who have psoriasis and may irritate bursae around the shoulders, hips, or knees.

In gout, uric acid crystals collect inside a joint and trigger sudden inflammation, redness, and severe pain, which may also affect nearby bursae and degenerative joint disease can also contribute. In osteoarthritis, cartilage gradually wears down over time.

As the joint loses its smooth surface, bones may rub more during movement and place extra stress on the bursa. Because these conditions continue to affect joint movement and tissue balance, bursitis becomes more likely, especially in weight-bearing joints such as the hips and knees.

10. Medication (As Aggravating Factor)

Some medications can raise the risk of bursitis or worsen existing symptoms because they affect tissue strength, inflammation, or the body’s response to infection. Long-term use of corticosteroids can weaken tendons and nearby soft tissues. As these tissues weaken, joints may face more strain during movement.

This extra pressure can irritate the nearby bursa, especially around the shoulder, hip, or knee. Repeated steroid injections in the same area may also irritate local tissue. Certain antibiotics in the fluoroquinolone group can also affect tendon health. These medicines may increase tendon strain and irritate nearby bursae.

Anticoagulants, also known as blood thinners, may increase the chance of bleeding after minor trauma. If bleeding occurs within a joint or bursa, swelling and pain may develop. Some medications that suppress the immune system reduce the body’s ability to fight infection. Under these conditions, bacteria that enter a bursa may lead to septic bursitis, often causing warmth, redness, and swelling.

11. Family History

Family history can play a role in bursitis. Although bursitis often develops from overuse or injury, inherited traits may increase the risk of joint stress or inflammation. Genetic factors can influence body structure, joint shape, and muscle balance. These differences may place extra pressure on certain joints and create uneven movement over time, which can irritate the fluid-filled bursae that cushion them.

Family history may also include inflammatory joint diseases such as rheumatoid arthritis and gout. These conditions can run in families and may cause inflammation that extends to nearby bursae. In some people, the body may also react more strongly to minor stress or injury, making swelling develop more easily. Family patterns of excess body weight can further increase risk. Extra body weight places greater pressure on weight-bearing joints such as the hips, knees, and ankles.

12. Career-Related Joint Strain

Many jobs place steady stress on the joints. Repeated motion, long hours on hard surfaces, awkward body positions, and limited rest can gradually increase pressure on the bursae that cushion the joints. With ongoing strain, these sacs may become irritated, leading to swelling and pain.

Workers who kneel frequently, such as carpet installers or plumbers, often place constant pressure on the knees, which can inflame the bursa in front of the kneecap. People who regularly lean on their elbows at a desk or workbench may also develop swelling at the tip of the elbow.

Repetitive lifting or reaching can strain the shoulders. Painters, warehouse staff, and healthcare workers often move their arms in the same pattern for long periods, which may irritate the shoulder bursa. Standing for long periods can also stress weight-bearing joints. Hard floors increase the load on the hips, knees, and ankles.

Jobs in retail, factory work, and food service commonly involve this type of strain. Aging can further increase vulnerability. As tissues gradually lose strength and flexibility, joints may tolerate repeated strain less effectively, and the likelihood of bursitis may rise.

13. Sports Injuries

Sports injuries often lead to bursitis because athletic activities place repeated stress on the joints. Frequent movement during training and competition increases friction around the joint, which can irritate the nearby bursa. High-impact sports such as running, basketball, football, and soccer place repeated pressure on the knees and hips.

Sports that involve repeated arm movements, including tennis, baseball, and other racquet activities, can strain the shoulders and elbows. Over time, this repeated use may increase pressure on the bursae. Sudden trauma during sports may also inflame a bursa. A fall or direct hit can quickly irritate the fluid-filled sac. For example, landing hard on the knee may inflame the small bursa in front of the kneecap, causing rapid swelling and pain.

Training habits can further influence risk. Increasing workout intensity too quickly or changing technique may overload a joint. Poor warm-up routines and weak muscles around the joint can add extra strain and make bursa irritation more likely.

14. Connective Tissue Disorders

Connective tissue disorders can raise the risk of bursitis because they affect the tissues that support joints, muscles, and organs. When these supporting tissues become weak or inflamed, joints and surrounding structures may experience extra stress.

Many connective tissue disorders develop through autoimmune processes. In autoimmune disease, the immune system mistakenly attacks healthy tissue. This ongoing inflammation can involve joints and nearby soft tissues, including the small fluid-filled bursae that cushion movement. As inflammation continues around the joint, nearby bursae may become irritated. Increased pressure and friction during movement can inflame the bursa and lead to pain.

Examples of connective tissue disorders include lupus, scleroderma, and certain inflammatory muscle disorders. These conditions often cause joint pain, stiffness, and swelling, which can contribute to bursitis in areas such as the shoulder, hip, or knee. Some connective tissue disorders are inherited, while others develop later in life.