Infrapatellar Bursitis

Is pain or swelling just below your kneecap making everyday activities increasingly uncomfortable?

Perhaps you've noticed a tender lump beneath your knee, or a sharp pain whenever you kneel down to do some gardening, clean the floor or work around the house.

Even getting down onto your knees to play with the grandchildren can suddenly become surprisingly painful.

If you've been diagnosed with infrapatellar bursitis, you'll know how frustrating it can be when seemingly simple activities become difficult.

The condition occurs when one of the small fluid-filled sacs beneath your kneecap becomes irritated or inflamed. It commonly develops through repeated pressure, kneeling or direct injury.

The good news is that many cases improve without surgery. Understanding what's causing the inflammation and how to avoid further irritation can help you take the right steps towards recovery.

What Is Infrapatellar Bursitis?

Your knee relies on several small fluid-filled sacs, called bursae, to provide cushioning and help reduce friction between the bones, tendons and surrounding tissues. Two of these bursae are located just below the kneecap, or patella.

When one becomes inflamed, it can fill with excess fluid, causing localised swelling, tenderness and pain. This is known as infrapatellar bursitis.

1. Superficial Infrapatellar Bursitis

The superficial infrapatellar bursa is located just beneath the skin, towards the front of the knee below the kneecap. Because it's close to the surface, inflammation can sometimes produce a visible lump or swelling.

This form of bursitis is frequently associated with repeated kneeling or pressure against hard surfaces. It's sometimes called clergyman's knee, a term dating back to the days when prolonged kneeling was a common part of religious activities.

2. Deep Infrapatellar Bursitis

The deep infrapatellar bursa is located further inside the knee, between the patellar tendon and the upper part of the shinbone. When this bursa becomes irritated, it may cause pain beneath the kneecap, particularly during certain movements or physical activities.

Unlike superficial bursitis, there may be little or no visible swelling. This can make the condition more difficult to distinguish from other causes of pain at the front of the knee. [1]

For a broader explanation of the different forms of bursitis affecting the knee, visit our Knee Bursitis Information page.

What Are the Symptoms of Infrapatellar Bursitis?

One of the frustrating things about infrapatellar bursitis is how much discomfort a relatively small area of inflammation can cause. You may be able to walk around reasonably comfortably, only to experience a sharp pain when kneeling or placing pressure directly below your kneecap.

Common symptoms include:

• Pain below the kneecap: Aching or tenderness directly beneath the patella, towards the upper shin.
• Localised swelling: A noticeable lump or soft swelling below the knee, particularly with superficial infrapatellar bursitis.
• Pain when kneeling: Direct pressure on the affected area can make kneeling particularly uncomfortable.
• Tenderness to touch: The area may feel sensitive when pressed or bumped.
• Discomfort during movement: Activities such as squatting, climbing stairs or exercising may aggravate symptoms.
• Knee stiffness: Swelling and discomfort may make certain movements feel restricted.

Symptoms can appear suddenly following an injury or develop gradually after repeated irritation.

It's also worth remembering that not everyone with infrapatellar bursitis will develop a visible lump, particularly when the deeper bursa is affected.

What Causes Infrapatellar Bursitis?

Infrapatellar bursitis commonly develops when the bursa is repeatedly compressed or irritated. Although anyone can develop the condition, some activities place considerably more pressure on the front of the knee than others.

Frequent Kneeling: Gardening, cleaning, flooring work, plumbing and other activities that involve kneeling on hard surfaces can place repeated pressure on the bursa.

Direct Injury or Impact: Falling onto your knee or knocking the area against a hard object may trigger inflammation and swelling.

Sports and Physical Activities: Activities involving repeated jumping, squatting or kneeling may contribute to irritation, particularly around the deeper bursa.

Underlying Joint Conditions: Certain inflammatory conditions, including gout and rheumatoid arthritis, can sometimes contribute to bursitis.

Repeated Pressure Without Adequate Recovery: Continuing to place pressure on an already irritated bursa may prolong symptoms.

Often, several contributing factors are involved rather than one particular injury.

Infrapatellar Bursitis vs Prepatellar Bursitis – What's the Difference?

Although both conditions affect the front of the knee, they involve different bursae.

Prepatellar bursitis occurs over the kneecap itself and commonly produces swelling directly in front of the patella.

Infrapatellar bursitis affects a bursa located below the kneecap, closer to the patellar tendon and upper shin.

Both conditions can develop through repetitive kneeling or direct injury. The location of the swelling or tenderness can provide a useful clue, although a professional examination may be needed to confirm which structure is affected.

How Is Infrapatellar Bursitis Diagnosed?

If you've noticed a persistent lump or ongoing pain beneath your kneecap, it's worth having the condition properly assessed.

A healthcare professional will usually begin by discussing your symptoms, recent injuries and any activities that aggravate your knee. They may examine the location of the swelling, check for tenderness and assess your knee movement. 

In many cases, a physical examination provides enough information to make an initial diagnosis. However, further investigations may be recommended.

Ultrasound: An ultrasound can help identify fluid within the bursa and distinguish bursitis from some other soft-tissue problems.

MRI Scan: An MRI may be useful when the deeper bursa is suspected or the diagnosis remains uncertain.

X-rays: Although X-rays don't directly show inflammation within the bursa, they may help rule out fractures or other bone-related problems.

It's important to remember that pain beneath the kneecap can also arise from patellar tendonitis, fat pad irritation or other knee conditions. [2]

What Are the Treatment Options for Infrapatellar Bursitis?

If you're experiencing persistent knee pain or swelling, your first priority is understandably to find some relief. Treatment generally focuses on reducing pressure on the inflamed bursa, managing discomfort and allowing the affected tissues to recover.

1. Rest and Activity Modification

Temporarily avoiding activities that aggravate your knee is often the most sensible starting point. In particular, try to avoid kneeling directly on the affected area or repeatedly placing pressure below the kneecap.

If your work or hobbies involve frequent kneeling, you may need to modify those activities while the inflammation settles. However, prolonged complete inactivity isn't generally necessary. Gentle walking and normal movement may be maintained, provided they don't significantly aggravate your symptoms.

2. Knee Protection and Support

If kneeling is unavoidable, appropriate knee protection may help reduce direct pressure on the affected area. Padded knee supports or cushioned surfaces may make certain activities more manageable. However, it's important that any support doesn't place additional pressure directly over the swollen bursa.

3. Heat Therapy

For ongoing knee stiffness or surrounding muscle tension, applying a warm compress or heat pack for 15–20 minutes may help improve comfort.

Heat may be more suitable for ongoing stiffness than for a recent injury or significant active swelling. Cold therapy is another option that may help manage pain during an acute flare-up.

Avoid applying heat if the knee is unusually hot, red or potentially infected.

4. Physiotherapy and Rehabilitation

During the early stages of painful bursitis, strenuous exercises or movements that repeatedly compress the inflamed bursa may aggravate symptoms. Gentle knee movement can often be maintained, provided it remains comfortable.

As the inflammation and associated pain settle, physiotherapy may help restore normal movement, rebuild muscle strength and address any weaknesses that have developed through reduced activity.

5. Medication and Medical Treatments

Pain-relieving or anti-inflammatory medication may be recommended to help manage discomfort, although these treatments aren't suitable for everyone.

In selected cases, a healthcare professional may consider draining fluid from a swollen superficial bursa or other medical interventions. However, drainage isn't routinely necessary, and inserting a needle carries risks, including infection.

If an infection is suspected, prompt medical assessment is particularly important because antibiotics or drainage may be necessary. Surgery is rarely required for uncomplicated infrapatellar bursitis. [3]

6. Drug-Free, Non-Invasive Knee Bursitis Relief with OSMO Patch

If you're looking for a drug-free, non-invasive way to help manage the swelling and associated pain from knee bursitis, the OSMO Patch offers a convenient home treatment option.

Simply apply the patch over the affected area before going to bed and let it work while you sleep. Designed to help reduce swelling and associated discomfort, OSMO Patch offers a drug-free, non-invasive option that may be used alongside appropriate rest and activity modification.

Discover how OSMO Patch may help you manage knee bursitis swelling and associated pain — so you can get back to enjoying your everyday activities.

>> Learn More About OSMO Patch for Knee Bursitis Relief →

(OSMO Patch is not suitable for individuals with seafood or shellfish allergies)

How Long Does Infrapatellar Bursitis Take to Heal?

Recovery times vary depending on the severity of the inflammation, whether the superficial or deep bursa is affected and whether the area continues to be irritated. Some people begin noticing improvement within a few weeks after reducing pressure on the affected knee.

However, more persistent cases can take several weeks or months, particularly when ongoing kneeling, repetitive strain or an underlying medical condition contributes to the problem.

One important point is that feeling less pain doesn't always mean the swelling has completely resolved. Returning too quickly to activities that repeatedly compress the bursa can sometimes trigger another flare-up.

Gradually returning to normal activities and avoiding unnecessary pressure on the affected area may help reduce the likelihood of symptoms returning.

Frequently Asked Questions About Infrapatellar Bursitis

Why Have I Developed a Lump Just Below My Kneecap?

A soft lump below the kneecap can sometimes be caused by fluid accumulating within the superficial infrapatellar bursa.

However, not every lump around the knee is bursitis. Other soft-tissue conditions can produce similar swelling, so a healthcare professional should assess any new or persistent lump.

Why Does My Knee Hurt When I Kneel but Feel Fine When Walking?

Kneeling places direct pressure on the tissues at the front of your knee, including the superficial infrapatellar bursa.

If the bursa is inflamed, that pressure can cause significant discomfort, even when ordinary walking remains relatively comfortable.

Can I Keep Walking or Exercising with Infrapatellar Bursitis?

Gentle walking may be fine if it doesn't significantly aggravate your symptoms.

However, activities involving kneeling, jumping, deep squatting or repeated pressure on the affected area may need to be temporarily reduced.

The key is to avoid repeatedly irritating the bursa while maintaining comfortable movement.

Is Infrapatellar Bursitis the Same as Patellar Tendonitis?

No. Infrapatellar bursitis involves inflammation of a fluid-filled bursa below the kneecap, while patellar tendonitis, or patellar tendinopathy, affects the tendon connecting the kneecap to the shinbone.

Because these structures are close together, the symptoms can overlap. An accurate diagnosis is important before beginning treatment.

Should I Use Ice or Heat for Infrapatellar Bursitis?

It depends on your symptoms.

Cold therapy may help reduce discomfort following a recent injury or during an acute flare-up.

Gentle heat may be more comfortable when symptoms involve ongoing stiffness or muscle tension.

Avoid using heat on a knee that is unusually hot, red or potentially infected.

Why Is the Swelling Below My Kneecap Not Going Away?

Persistent swelling can occur when the bursa continues to be irritated by kneeling, pressure or repetitive activity.

However, swelling that doesn't improve, becomes larger or changes in appearance should be assessed by a healthcare professional to confirm the diagnosis and exclude other causes.

Can Infrapatellar Bursitis Become Infected?

Yes. Although not every swollen bursa is infected, superficial bursae can occasionally develop a bacterial infection.

Increasing redness, warmth, swelling, fever or feeling generally unwell may indicate an infection requiring prompt medical attention.

Can Infrapatellar Bursitis Heal Without Surgery?

Yes. Many cases improve with conservative management, including reducing pressure on the affected area, modifying aggravating activities and appropriate pain management.

Surgery is rarely required for uncomplicated infrapatellar bursitis.

When Should You Seek Medical Attention?

If pain or swelling below your kneecap persists, worsens or begins interfering significantly with your everyday activities, consult a qualified healthcare professional.

Seek urgent medical attention if your knee becomes increasingly red, hot or swollen, particularly if you develop a fever or feel unwell.

Severe pain following an injury, an inability to bear weight or significant difficulty moving the knee also warrants prompt assessment.

 

Medical References

[1] Perdikakis E, Skiadas V: Bursae Around the Knee Joints. Indian Journal of Radiology and Imaging, 2012. Read the medical reference

[2] Mayo Clinic: Knee Bursitis – Symptoms and Causes. Read the Mayo Clinic guidance

[3] American Family Physician: Common Superficial Bursitis. Read the clinical review