My knees pop almost every time I bend them up with that?

Knee pops, also known as crepitus, are common and can be caused by several factors. They are usually harmless, but sometimes can indicate an underlying medical condition. Here are some possible causes:

1. Trapped Air or Gas Bubbles: When the knee joint moves, synovial fluid, which acts as a lubricant, may form small bubbles that create a popping sound when they burst. This is usually not a cause for concern and is common, especially after prolonged inactivity.

2. Ligaments and Tendons: As the knee bends, ligaments and tendons around the joint may snap or flick against bony prominences, producing an audible pop. This is often associated with normal knee movement and is not typically a problem unless accompanied by pain or swelling.

3. Loose Bodies: In some cases, knee pops may be caused by the presence of loose bodies or fragments of cartilage within the knee joint. These loose pieces can move and create a popping or grinding sensation when they interfere with the joint's smooth motion.

4. Meniscus Tear: A torn meniscus, which is a piece of cartilage that cushions the knee, can sometimes produce popping sounds. Meniscus tears can occur during sudden twisting or pivoting movements and may be accompanied by pain and difficulty walking.

5. Osteoarthritis: Advanced stages of osteoarthritis, where the cartilage in the knee joint wears down, can cause bones to rub against each other, leading to crepitus. This can be accompanied by pain, stiffness, and reduced joint mobility.

6. Other Medical Conditions: In rare cases, knee pops may be associated with more serious medical conditions, such as infections, tumors, or underlying musculoskeletal disorders.

7. Quadriceps Tendonitis: This condition causes the tendon connecting the kneecap to the shinbone to become inflamed. It often results in pain at the kneecap and popping or grinding sensations during knee movement.

When to Seek Medical Attention:

Although most knee pops are not a cause for concern, it is important to see a healthcare professional if you experience:

- Persistent pain

- Swelling

- Locking or catching sensation in the knee

- Restricted movement

- A sudden onset of knee pops

- Pops that are accompanied by fever or other systemic symptoms

Your doctor can perform a physical examination and may recommend imaging tests, such as an X-ray or MRI, to determine the underlying cause and recommend appropriate treatment if needed.