Left Lower Back Numbness: Causes and When to Seek Help

Numbness in the lower left back?

Hello Dr.
Lai: I have very little physical activity.
Last week, after walking for 2 hours, I felt quite tired, and afterward, while sitting down, I experienced a tingling sensation in my lower left back that lasted for about 30 seconds before disappearing.
I have a slight hunchback, and when I adjust my sitting posture to sit up straight, the tingling sensation occurs less frequently.
Sometimes, when I stand still and lean forward a bit to look at my phone, I also experience this sensation, but it again lasts for about 30 seconds and then goes away.
The same happens when I sit in front of the computer or squat; whenever I feel the tingling, it only lasts for a short time and does not persist.
A few years ago, I experienced similar symptoms, but after doing some arm-swinging exercises for a while, I recovered.
My lower limbs are normal, and I do not feel any discomfort while lying down to sleep.
Some people say that this is due to a lack of exercise and poor blood circulation.
I would like to ask Dr.
Lai what might be causing my symptoms, whether I need to seek medical attention, and which specialty I should consult.
Thank you.

KH, 50~59 year old female. Ask Date: 2017/12/01

Dr. Lai Zhaokang reply Neurosurgery

Hello, it is suspected to be a lumbar spine issue.
It is recommended to consult a neurosurgeon, rehabilitation specialist, or orthopedic doctor.
Best wishes.
// Neurosurgeon Dr.
Lai Chao-Kang.

Reply Date: 2017/12/01

More Info

Understanding left lower back numbness can be complex, as it may stem from various causes, including muscular issues, nerve compression, or postural problems. Based on your description, it seems that your symptoms are likely related to posture and muscle tension rather than a serious underlying condition. However, it is essential to consider several factors to determine the best course of action.

Possible Causes of Your Symptoms
1. Postural Issues: You mentioned having a slight hunchback (kyphosis) and that adjusting your posture helps alleviate the numbness. Poor posture can lead to muscle imbalances and tension, particularly in the back and neck. When sitting or standing with a forward-leaning posture, the muscles in your lower back may become strained, leading to temporary numbness or tingling sensations.

2. Nerve Compression: The numbness you experience could also be due to nerve compression, possibly from a herniated disc or spinal stenosis. However, since your symptoms are temporary and resolve quickly, this is less likely. If the numbness were due to nerve compression, you would typically experience more persistent symptoms, possibly accompanied by pain or weakness.

3. Muscle Strain: Engaging in physical activity, such as walking for two hours, can lead to muscle fatigue or strain, particularly if you are not accustomed to regular exercise. This strain can cause temporary numbness or tingling sensations as the muscles recover.

4. Circulation Issues: While less likely, poor circulation due to inactivity can lead to numbness. However, you noted that your symptoms resolve quickly, which suggests that circulation is not a significant concern in your case.

When to Seek Medical Help
Given that your symptoms are temporary and resolve within 30 seconds, it may not be necessary to seek immediate medical attention. However, you should consider consulting a healthcare professional if:
- The numbness becomes persistent or worsens.

- You experience additional symptoms, such as pain radiating down your leg, weakness, or loss of bladder/bowel control.

- You have a history of significant back injuries or conditions that could complicate your symptoms.

If you decide to seek medical help, a visit to a primary care physician or a physical therapist would be appropriate. They can evaluate your posture, muscle strength, and flexibility, and recommend exercises or treatments to improve your condition.

Recommendations for Management
1. Posture Correction: Focus on maintaining good posture while sitting and standing. Use ergonomic furniture if possible, and take regular breaks to stretch and move around.

2. Strengthening Exercises: Incorporate exercises that strengthen your core and back muscles. A strong core can help support your spine and reduce the risk of muscle strain.

3. Stretching: Regular stretching can help alleviate muscle tension and improve flexibility. Consider incorporating stretches that target the lower back, hamstrings, and hip flexors.

4. Gradual Increase in Activity: Since you mentioned that you are not very active, gradually increasing your physical activity can improve circulation and muscle strength, potentially reducing numbness.

5. Heat Therapy: Applying heat to your lower back may help relax tight muscles and improve blood flow.

In conclusion, while your symptoms may be related to posture and muscle tension, it is essential to monitor them closely. If they persist or worsen, seeking medical advice is crucial. Implementing posture correction, strengthening exercises, and maintaining an active lifestyle can significantly improve your overall back health and reduce the likelihood of experiencing similar symptoms in the future.

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