What causes numbness in the calf?

Apr 17, 2023 Source: Cainiu Health
Dr. Wang Jianjun
Introduction
Calf numbness can be caused by physiological factors, lumbar disc herniation, phlebitis, and other conditions. Poor blood circulation in the calf may lead to numbness. In lumbar disc herniation, protruding disc tissue compresses spinal nerves or the cauda equina, causing radiating pain and resulting in calf numbness. Inflammatory changes in the veins and surrounding tissues of the calf can lead to phlebitis, impairing blood flow and causing ischemia, which in turn results in calf numbness.

Numbness in the calf may be caused by physiological factors or pathological conditions, such as lumbar disc herniation or phlebitis.

I. Physiological Factors

Intense physical activity over a prolonged period can lead to excessive fatigue in the calf muscles. Additionally, exposure of the legs to cold may impair blood circulation in the lower limbs, resulting in numbness. It is recommended to keep the legs warm and apply local heat therapy or massage to improve blood flow and relieve symptoms.

II. Pathological Factors

1. Lumbar Disc Herniation

In cases of lumbar disc herniation, protruding intervertebral disc tissue may compress spinal nerves or the cauda equina, causing radiating pain. This pain typically spreads from the lower back to the buttocks, the posterior-lateral thigh, and down to the calf, leading to symptoms such as numbness and pain in the calf. Adequate rest is advised, and muscle relaxants may be taken under medical guidance. Commonly used medications include eperisone hydrochloride tablets, tizanidine hydrochloride tablets, and chlorzoxazone tablets, which help relax muscles and alleviate symptoms.

2. Phlebitis

Factors such as excessive obesity, prolonged standing, or sitting for long periods may cause inflammatory changes in the veins and surrounding tissues of the calf, leading to phlebitis. This inflammation impairs venous blood flow and may result in ischemia, causing symptoms like pain and numbness in the calf. Symptoms can be alleviated with treatments such as electromagnetic wave therapy or semiconductor laser therapy administered by qualified medical professionals.

In addition, lower limb venous thrombosis could also be a potential cause. A detailed medical evaluation at a hospital is recommended to identify the specific condition and receive appropriate treatment.

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