Knee condition

Knee Bursitis

Also called: Prepatellar or Pes Anserine Bursitis

Knee bursitis is inflammation of a bursa - a small, fluid-filled sac that cushions the knee and helps tendons and skin glide smoothly over the joint. When a bursa is irritated by kneeling, a knock or repeated pressure, it fills with extra fluid, causing swelling, tenderness and pain over the knee. It is usually short-lived and treatable at home.

Symptoms

Knee bursitis tends to come on over hours or days, often after kneeling or a bump. Common signs include:

  • Swelling that you can often see and feel over the kneecap or inner knee
  • Tenderness and warmth when you press on the area
  • Pain that worsens with kneeling, squatting or direct pressure
  • A squishy, fluid-filled feeling rather than deep joint pain
  • Stiffness or reduced movement when the swelling is large
  • Redness and heat if the bursa becomes infected (needs urgent care)

Causes

Bursitis develops when a bursa is irritated or injured and produces excess fluid. Common contributors:

  • Frequent or prolonged kneeling ("housemaid's knee" in floor-based work)
  • A direct blow or fall onto the knee
  • Repetitive movements or overuse from sport or work
  • Existing conditions such as arthritis or gout
  • An infection entering the bursa through a cut or scrape
  • Extra load on the joint from being overweight

What helps knee bursitis?

Most knee bursitis settles on its own when you take pressure off the joint and calm the inflammation. Rest, ice, and avoiding kneeling are the foundation, alongside drug-free pain relief while it heals. A knee pain patch worn over the area gives steady, medication-free relief and is easy to wear under clothing during the day.

  • Rest and avoid kneeling, squatting or direct pressure
  • Ice the area for 15–20 minutes several times a day to reduce swelling
  • Use gentle compression and elevate the leg when resting
  • Use drug-free relief - a knee pain patch over the sore area
  • Kneel on a cushioned pad if your work or hobby requires it
  • Return to activity gradually as the swelling settles
Shop the knee pain patch Browse all knee pain patches

Frequently asked questions

How long does knee bursitis take to heal?
Most cases of knee bursitis settle within a few weeks with rest, ice and avoiding the activity that caused it. Milder flare-ups can ease in days, while stubborn or repeatedly irritated bursitis may take several weeks. If swelling does not improve after two to three weeks, or the knee becomes hot and red, see a doctor.
What is the difference between knee bursitis and arthritis?
Knee bursitis is inflammation of a fluid-filled sac that cushions the knee, so it usually causes swelling and tenderness on the surface of the joint. Arthritis is wear or inflammation inside the joint itself, causing deep, aching pain and stiffness. Bursitis often follows kneeling or a knock; arthritis builds gradually over years.
Should you massage knee bursitis?
Avoid deep massage directly on an inflamed bursa, as pressure can make swelling worse. Gentle movement, ice and rest are safer during a flare-up. Once the swelling settles, light massage around - not on - the area and gentle stretching can help restore movement. If you are unsure, check with a physiotherapist first.
Can you walk with knee bursitis?
You can usually walk with mild knee bursitis, but avoid kneeling, squatting and long periods on your feet, which press on the inflamed bursa. Gentle walking keeps the joint mobile without loading it. If walking is painful or the knee is very swollen, rest more and use ice until the inflammation calms down.
When should you see a doctor?
See a doctor if the knee becomes hot, red and swollen, if you have a fever, or if the swelling does not improve after a couple of weeks. These can signal an infected bursa, which needs prompt treatment. Also seek advice if bursitis keeps coming back, as the cause may need addressing.
A quick, honest note. This guide is for general education and does not replace a diagnosis from a qualified clinician. mLab makes natural pain-relief patches and support devices - they can ease day-to-day discomfort, but they do not treat or cure bursitis. If the knee becomes hot, red and swollen, or you develop a fever, see a doctor promptly, as this can signal an infection.