Leg Numbness and Back Pain After an Accident - Neurology

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Numbness in the legs and lower back pain?


Hello doctor, I was involved in a car accident at the beginning of last month where a vehicle hit me while I was walking.
I fell and sustained bruising and contusions on my knee.
I can walk normally now, but I occasionally experience numbness on the outer side of my right thigh, regardless of whether I am standing, sitting, or lying down.
The episodes are unpredictable and do not last long.
I have had an orthopedic examination and X-rays, which showed no issues with the bones.
I was prescribed a muscle relaxant, but the symptoms still occur.
What could be the cause? Should I see a neurologist or a rehabilitation specialist?

Xiao Ning, 30~39 year old female. Ask Date: 2021/12/16

Dr. Jiang Junyi reply Neurology


Dear Ms.
Hsiao-Ning,
You mentioned that "the outer side of your right thigh occasionally feels numb, whether you are standing, sitting, or lying down." This may indicate compression of the nerve roots at the second and third lumbar vertebrae.
Additionally, it could be due to tightness from a belt causing compression of the lateral femoral cutaneous nerve.
I recommend that you consult with a rehabilitation specialist or a neurologist/neurosurgeon for further evaluation and treatment.
Thank you for your inquiry, and feel free to discuss any related questions! Wishing you good health.
Best regards,
Dr.
Chih-Yi Chiang
Peach Blossom Medical Clinic

Reply Date: 2021/12/16

More Info


After experiencing a car accident, it's not uncommon to have lingering symptoms such as leg numbness and back pain. In your case, the fact that you were hit from behind and fell, resulting in bruising on your knee, suggests that there may be soft tissue injuries or nerve involvement that could explain the numbness in your right thigh.

The numbness you're experiencing in the outer side of your thigh could be attributed to several factors. One possibility is that the impact from the accident may have caused some degree of trauma to the soft tissues, including muscles, tendons, and ligaments, which can lead to inflammation and irritation. This inflammation can sometimes compress nearby nerves, resulting in sensations of numbness or tingling.
Another potential cause could be related to the position you were in during the accident or the way you landed. If you landed awkwardly or if there was a sudden jolt, it could have affected your spine or pelvis, leading to nerve irritation. The lateral femoral cutaneous nerve, which supplies sensation to the outer thigh, can be compressed or irritated due to various reasons, including trauma or prolonged pressure on the hip area.

Since you have already undergone an X-ray, which showed no bone fractures, it is essential to consider further evaluation. While orthopedic specialists are excellent for assessing bone-related issues, your symptoms may warrant a visit to a neurologist or a rehabilitation specialist. A neurologist can perform nerve conduction studies or electromyography (EMG) to assess the function of your nerves and determine if there is any nerve damage or compression. On the other hand, a rehabilitation specialist can help you with physical therapy, focusing on strengthening and stretching exercises that may alleviate your symptoms.

In terms of treatment, if your symptoms are mild and manageable, conservative approaches such as physical therapy, rest, and anti-inflammatory medications may be recommended. Physical therapy can help improve strength and flexibility, which may reduce the pressure on the nerves and alleviate numbness. Additionally, modalities such as heat, ice, or ultrasound therapy may be beneficial in managing pain and inflammation.

If your symptoms persist or worsen, further imaging studies, such as an MRI, may be necessary to evaluate the soft tissues and spinal structures more thoroughly. This can help identify any herniated discs, nerve impingements, or other underlying issues that may not be visible on an X-ray.

In summary, the numbness in your thigh following the car accident could be due to soft tissue injury, nerve irritation, or compression. It is advisable to consult with a neurologist or a rehabilitation specialist for a comprehensive evaluation and tailored treatment plan. Early intervention can help prevent chronic issues and facilitate a quicker recovery, allowing you to return to your normal activities without long-term complications.

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