Pain Behind the Left Knee: Causes and Treatment Options

Pain behind the left knee?

Hello, Doctor.
I have pain in the back of my left knee when I exert force, but it feels fine when it's straightened.
It hurts a lot when I bend my knee! Additionally, it hurts even more when I stand up after sitting down! It feels like I can barely stand, and sometimes I feel like my left leg can't support me, so I have to hold onto something to stand properly.
This pain started around September, and now, almost at the end of October, it still hurts a lot! I visited an orthopedic doctor at the beginning of October and took medication for five days.
During those days, the pain was not too bad, but after finishing the medication, the pain returned.
Doctor, which specialty should I see? Should I go to a rehabilitation department or another specialty? Thank you.

Jennifer, 20~29 year old female. Ask Date: 2006/10/25

Dr. Chu Baijun reply Orthopedics

Hello! Based on your described symptoms, it seems you may have knee arthritis.
However, since I cannot determine your exact age from your basic information, it is possible that it could be degenerative arthritis.
Continuing follow-up treatment with an orthopedic specialist is advisable.
Thank you! Sincerely, Dr.
Chu Bo-jun, Orthopedic Department.

Reply Date: 2006/10/25

More Info

Understanding pain behind the left knee can be quite complex, as there are numerous potential causes for this discomfort. Based on your description, it seems that the pain intensifies when bending the knee and when transitioning from sitting to standing, which can significantly affect your mobility and quality of life.

Potential Causes of Pain Behind the Knee
1. Meniscus Injury: The meniscus is a C-shaped cartilage that acts as a cushion between your thigh bone and shin bone. A tear in the meniscus can lead to pain, especially during movements that involve bending the knee. This is often accompanied by swelling and a sensation of locking or catching in the knee.

2. Ligament Injuries: Injuries to the ligaments, such as the posterior cruciate ligament (PCL) or the medial collateral ligament (MCL), can cause pain behind the knee. These injuries often occur during sports or physical activities that involve sudden stops or changes in direction.

3. Baker's Cyst: A Baker's cyst, or popliteal cyst, is a fluid-filled sac that forms behind the knee. It can develop due to conditions such as arthritis or a meniscus tear, leading to swelling and pain, particularly when bending the knee.

4. Tendonitis: Inflammation of the tendons around the knee, such as the hamstring tendons, can also cause pain. This is often exacerbated by activities that involve repetitive knee bending or heavy lifting.

5. Arthritis: Osteoarthritis or rheumatoid arthritis can lead to pain and stiffness in the knee joint, particularly when bending or after periods of inactivity.

Treatment Options
Given that you have already consulted with an orthopedic specialist and experienced temporary relief from medication, it may be beneficial to explore further treatment options:
1. Physical Therapy: A referral to a physical therapist can be highly beneficial. They can provide targeted exercises to strengthen the muscles around the knee, improve flexibility, and reduce pain. They may also employ modalities such as ultrasound or electrical stimulation to alleviate discomfort.

2. Pain Management: If over-the-counter pain relievers are not effective, your doctor may prescribe stronger anti-inflammatory medications or corticosteroid injections to reduce inflammation and pain.

3. Imaging Studies: If your symptoms persist, further imaging studies such as an MRI may be warranted to assess for any underlying structural issues, such as tears in the meniscus or ligaments.

4. Activity Modification: Avoiding activities that exacerbate your pain is crucial. Low-impact exercises, such as swimming or cycling, may be recommended to maintain fitness without putting undue stress on your knee.

5. Surgical Options: In cases where conservative treatments fail and significant structural damage is identified, surgical intervention may be necessary. This could involve repairing a torn meniscus or ligament.

When to Seek Further Help
If your pain continues to interfere with daily activities or worsens despite conservative treatment, it may be time to revisit your orthopedic specialist or consider consulting a rehabilitation physician. They can provide a comprehensive evaluation and tailor a treatment plan specific to your needs.

In conclusion, while pain behind the knee can stem from various causes, understanding the underlying issue is crucial for effective treatment. Engaging in physical therapy, considering pain management strategies, and possibly undergoing further diagnostic imaging can help you regain function and alleviate discomfort. Always consult with your healthcare provider to determine the best course of action tailored to your specific situation.

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