What illness causes one leg to be thicker and the other thinner?

One leg being thicker than the other may be caused by conditions such as muscle atrophy, poliomyelitis, or lower extremity venous thrombosis. In such cases, early medical evaluation is necessary. Once the underlying cause is identified, follow your doctor's advice to choose appropriate treatment measures. Specific causes are analyzed as follows:

1. Disuse Muscle Atrophy

For example, after a leg fracture requiring prolonged immobilization with a cast, lack of movement during fixation can lead to disuse muscle atrophy, resulting in noticeable thinning of the affected limb once the cast is removed. Patients are advised to strengthen muscle exercises and walking training, combined with warm baths and massage, to improve signs of atrophy.

2. Poliomyelitis

Infection with the poliovirus leads to neuronal necrosis, causing damage to leg muscles and resulting in legs of unequal thickness, often accompanied by fever and limb pain. If deformity is severe, consult a physician regarding surgical options such as joint fusion or limb lengthening procedures. Adequate bed rest is required post-surgery.

3. Lower Extremity Venous Thrombosis

Prolonged bed rest due to illness or trauma can impair blood flow in the legs, causing sluggish circulation and venous stasis, leading to deep vein thrombosis in the lower limbs. This results in abnormal leg appearance along with symptoms such as pain and numbness. Patients should consult their doctor about medications such as rivaroxaban tablets, warfarin sodium tablets, or dabigatran etexilate capsules. These drugs help promote venous blood return in the lower limbs and alleviate symptoms.

In addition, other possible causes include synovial cysts, fractures, or congenital hip dysplasia. It is recommended that patients seek timely medical attention upon noticing the above symptoms to prevent worsening of the condition.