There are many possible reasons for pain behind the knee, including:
- Injury: A common cause of pain behind the knee is an injury, such as a torn meniscus, ligament tear, or muscle strain. These injuries can occur during sports or other activities that put stress on the knee.
- Overuse: Overuse of the knee can also cause pain behind the knee. This is often seen in runners, cyclists, and other athletes who train regularly.
- Arthritis: Arthritis is another common cause of pain behind the knee. Osteoarthritis is the most common type of arthritis, and it can cause the cartilage in the knee to wear down over time. This can lead to pain and inflammation.
- Baker’s cyst: A Baker’s cyst is a fluid-filled sac that can develop behind the knee. It is often caused by another problem with the knee, such as arthritis or a torn meniscus.
- Other medical conditions: Other medical conditions, such as gout, infection, and nerve damage, can also cause pain behind the knee.
If you are experiencing pain behind the knee, it is important to see a doctor to determine the underlying cause and get the appropriate treatment.
Here are some tips for relieving pain behind the knee:
- Rest: Rest the knee as much as possible to give it time to heal.
- Ice: Apply ice to the knee for 20 minutes at a time, several times a day. This can help to reduce inflammation and pain.
- Compression: Wrap the knee in a compression bandage to help reduce swelling.
- Elevation: Elevate the knee above the level of the heart when you are sitting or lying down. This can help to reduce swelling.
- Over-the-counter pain relievers: Over-the-counter pain relievers, such as ibuprofen and acetaminophen, can help to reduce pain and inflammation.
If you have severe pain or the pain does not improve with home treatment, see a doctor. You may need prescription medication or physical therapy.
English 
Japanese