Knee Injury and Its Unexpected Impact on Lower Back Pain - Orthopedics

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Knee impact can cause pain in the lumbar spine?


I practiced extreme sports last night and accidentally bumped my knee.
I was wearing a knee brace, but it still hurts a little.
However, when I woke up the next morning, my lumbar spine started to hurt a bit, and I have difficulty bending.
Could this be related to ankylosing spondylitis? Also, why would my lumbar spine hurt after hitting my knee? Since today is Sunday and I can't see a doctor, I'm quite worried.
Thank you for your response.

Fa Lan, 20~29 year old female. Ask Date: 2005/11/13

Dr. Chu Baijun reply Orthopedics


Hello, injuries to various parts of the body due to sports accidents are commonly seen in clinical practice, but the nature and location of the injuries can vary.
It is relatively unlikely for knee injuries to directly cause lower back pain.
The ankylosing spondylitis mentioned in the question has specific diagnostic criteria, and not all cases of lower back pain are related to it.
If the condition does not improve, it is advisable to seek medical treatment.
Wishing you safety!

Reply Date: 2005/11/13

More Info


Knee injuries can have a surprising impact on other areas of the body, including the lower back. Your experience of knee pain following an incident during extreme sports, coupled with subsequent lower back pain, raises several important considerations.

Firstly, it is essential to understand the relationship between the knee and the lower back. The body functions as an interconnected system, and an injury in one area can lead to compensatory changes in others. When you experience pain or limited mobility in your knee, you may unconsciously alter your gait or posture to avoid discomfort. This compensation can place additional stress on the lower back, leading to pain or discomfort in that region.

In your case, the knee injury may have caused you to adjust your movements, which could strain the muscles and ligaments in your lower back. This is particularly true if you are favoring one leg over the other or if you are avoiding bending at the knee, which can lead to overuse of the back muscles. Additionally, the protective mechanisms of the body may cause tension in the lower back as it tries to stabilize your posture while you adjust to the knee pain.

Regarding your concern about ankylosing spondylitis (AS), it is a type of inflammatory arthritis that primarily affects the spine and can lead to chronic pain and stiffness. While your knee injury is unlikely to directly cause AS, if you have a history of this condition or similar symptoms, it is essential to monitor your overall health. Symptoms of AS typically include persistent lower back pain and stiffness, especially in the morning or after periods of inactivity. If you have any concerns about AS or if you experience additional symptoms such as fatigue, fever, or eye inflammation, it would be prudent to seek medical advice as soon as possible.

To alleviate your current symptoms, consider the following recommendations:
1. Rest and Ice: Allow your knee to rest and apply ice to reduce swelling and pain. Avoid activities that exacerbate the pain.

2. Gentle Stretching and Strengthening: Engage in gentle stretching exercises for both your knee and lower back. Strengthening the muscles around the knee and core can provide better support and stability.

3. Posture Awareness: Pay attention to your posture when standing or sitting. Maintaining a neutral spine can help reduce strain on your lower back.

4. Heat Therapy: After the initial swelling has gone down, applying heat to the lower back may help relax tight muscles and alleviate pain.

5. Over-the-Counter Pain Relief: Nonsteroidal anti-inflammatory drugs (NSAIDs) can help manage pain and inflammation in both your knee and lower back.

6. Physical Therapy: If pain persists, consider consulting a physical therapist who can design a rehabilitation program tailored to your needs, focusing on both knee and back health.

7. Follow-Up: Since it is currently a weekend and you cannot see a doctor, monitor your symptoms closely. If your pain worsens or if you develop new symptoms, seek medical attention promptly.

In summary, while your knee injury may not directly cause lower back pain, the compensatory mechanisms of your body can lead to discomfort in other areas. It is crucial to address both the knee and back pain holistically to promote recovery and prevent further complications. If symptoms persist or worsen, do not hesitate to seek professional medical advice.

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