Prepatellar Bursitis: Symptoms, Causes & Treatment Options
If you have noticed a sudden, painful lump on the front of your knee, you might be dealing with prepatellar bursitis. Also known as “housemaid’s knee,” this common condition can make daily activities like walking, bending, or kneeling difficult.
At the clinic of Hasan Syed MD, we specialize in diagnosing and treating joint pain so you can get back to your active lifestyle. In this guide, we will explore what causes this condition, how to recognize the symptoms, and the most effective treatments available.
What is Prepatellar Bursitis?
To understand what is prepatellar bursitis, it helps to know a little bit about your knee’s anatomy. Just in front of your kneecap (patella) sits a small, fluid-filled sac called the prepatellar bursa. This bursa acts as a gliding surface to reduce friction between your skin and the kneecap bone.
When this sac experiences excessive pressure, friction, or trauma, it becomes irritated and inflamed. It produces excess fluid, causing the front of the knee to swell. Whether you call it prepatellar bursitis or prepatella bursitis, the result is the same: uncomfortable swelling and pain that limits your movement.
Causes of Prepatellar Bursitis
Bursitis in the knee rarely happens without a clear trigger. The most common causes include:
- —Repetitive kneeling: People who spend long hours on their knees—such as carpenters, plumbers, gardeners, and carpet layers—are at a high risk. The constant pressure irritates the bursa over time.
- —Direct trauma: A sudden blow to the knee, like a fall or a hard tackle in sports, can damage the bursa and trigger sudden inflammation.
- —Infection: A scrape, bug bite, or cut over the kneecap can allow bacteria to enter the bursa sac, leading to an infection.
- —Underlying medical conditions: Conditions like gout or rheumatoid arthritis can also contribute to bursa inflammation.
Symptoms of Prepatellar Bursitis
Recognizing the symptoms of prepatellar bursitis early helps you get the right treatment faster. You may experience one or more of the following:
- —A visible, squishy lump over your kneecap
- —Pain or tenderness, especially when touching the knee or kneeling
- —A tight feeling when you try to bend your knee completely
- —Warmth and redness around the knee cap
Swelling in Prepatellar Bursitis
The most obvious sign of this condition is swelling. Swelling prepatellar bursitis occurs because the irritated bursa produces excess fluid to protect the joint. In mild cases, the knee might just look slightly puffy. In severe cases, the bursa can swell to the size of a small grapefruit. You will typically be able to feel this fluid-filled pocket right beneath your skin.
Septic vs. Infectious Prepatellar Bursitis
Most cases of knee bursitis are non-infectious, meaning they stem strictly from pressure or injury. However, if bacteria enter the bursa, it becomes a dangerous condition known as septic prepatellar bursitis or infectious prepatellar bursitis.
Seek immediate medical attention if you experience any of these warning signs of infection:
- —A high fever or chills
- —Skin over the knee that is hot to the touch
- —Spreading redness around the joint
- —Severe, throbbing pain that worsens rapidly
An infected bursa requires urgent evaluation and treatment to prevent the bacteria from spreading into your bloodstream or deeper into the knee joint.
Diagnosis and ICD-10 Coding
To diagnose your knee pain, Dr. Syed will discuss your medical history and carefully examine your knee. He will check your range of motion and look for signs of infection. If an infection is suspected, we may perform a quick procedure to draw a small amount of fluid from the bursa (aspiration) for lab testing.
For medical billing and documentation, you may see the prepatellar bursitis ICD 10 category referenced on your paperwork. The general code is M70.4, but precise coding depends on the clinical record and laterality. For example, M70.40 is for an unspecified knee, M70.41 is for the right knee, and M70.42 is for the left knee.
You might also come across medical resources like prepatellar bursitis orthobullets while researching your condition online. While this is a common educational reference used by medical students and professionals, we encourage you to consult directly with an orthopedic specialist for advice tailored to your specific knee.
Prepatellar Bursitis Treatment
The right prepatellar bursitis treatment depends heavily on whether your bursa is simply inflamed or actively infected.
Treatment for Non-Infectious Bursitis
If your bursa is not infected, we typically start with conservative treatment for prepatellar bursitis. This may include:
- —Rest and Activity Modification: Avoiding the activities that triggered the swelling, especially kneeling.
- —Ice and Elevation: Applying ice packs for 20 minutes at a time to reduce inflammation.
- —Compression: Wearing a snug knee sleeve or wrap to limit swelling.
- —Medication: Over-the-counter anti-inflammatory drugs (NSAIDs) to manage pain.
- —Drainage and Corticosteroids: If swelling persists, Dr. Syed may drain the excess fluid and inject a corticosteroid medication to quickly calm the inflammation.
Treatment for Infectious Bursitis
If you have an infectious bursa, treatment requires a more aggressive approach:
- —Antibiotics: Prescription oral or intravenous (IV) antibiotics are necessary to clear the bacteria.
- —Surgical Drainage: We may need to drain the infected fluid completely.
- —Bursectomy: In severe or recurring cases, minor surgery to remove the infected bursa sac entirely may be required.
Prevention and Lifestyle Adjustments
You can take simple steps to protect your knees and prevent this condition from returning:
- —Wear thick, supportive knee pads if you work or garden on your knees.
- —Take frequent breaks to stand up and stretch your legs.
- —Clean any cuts or scrapes on your knees immediately to prevent infection.
- —Apply ice to your knees after heavy use or sports.
Recovery Expectations
Your recovery timeline depends on the severity of the bursitis. For mild, non-infectious cases, symptoms often resolve within two to three weeks with proper rest and home care. If you require fluid drainage or a steroid injection, relief is usually rapid, though you will still need to avoid kneeling for a few weeks.
Infectious cases require a longer recovery period. You will need to complete a full course of antibiotics, and full healing may take several weeks. If surgical removal of the bursa is necessary, your knee will need time to heal, but the bursa eventually grows back as a healthy, non-inflamed sac over several months.
When to See a Specialist
Do not ignore knee swelling. You should schedule an appointment with an orthopedic specialist if:
- —Your swelling and pain do not improve after two weeks of rest.
- —Your pain prevents you from walking or bending your knee.
- —The swelling continues to get larger.
- —You notice any signs of infection, such as fever, warmth, or spreading redness.
Frequently Asked Questions (FAQs)
How long does it take for prepatellar bursitis to heal?
Most non-infectious cases heal within two to three weeks with rest, ice, and avoiding pressure on the knee. Infected or severe cases may take longer and require medical intervention.
Should I walk if I have prepatellar bursitis?
Walking is generally safe as long as it does not cause significant pain. However, you should avoid deep squats, kneeling, and high-impact activities like running until the swelling goes down.
Do I need surgery for knee bursitis?
Surgery is rarely the first step. It is usually only recommended if the bursa is severely infected and does not respond to antibiotics, or if you have chronic bursitis that keeps returning despite conservative treatments.
Is a knee brace helpful for prepatellar bursitis?
A soft, compressive knee sleeve or wrap can help control swelling and provide a sense of stability. Avoid tight, rigid braces that place direct pressure on the kneecap, as this can irritate the bursa further.
Expert Orthopedic Care with Hasan Syed MD
Persistent knee pain and swelling disrupt your life. You deserve an accurate diagnosis and a personalized treatment plan that works. Dr. Hasan Syed is a board-certified orthopedic surgeon dedicated to patient-centered orthopedic and sports injury care.
With convenient clinic locations in Chino and Loma Linda, California, getting expert help is easy. We will carefully evaluate your knee, explain your options in plain language, and help you get back on your feet safely.
