What causes the left leg to be more swollen than the right leg?

       Under normal circumstances, left leg swelling compared to the right may be caused by poor posture, varicose veins, myofascial inflammation, aseptic inflammation, or vascular-origin edema. It is recommended to undergo targeted treatment based on the specific cause. Details are as follows:

　　1. Poor posture: Prolonged standing or sitting may lead to impaired circulation in the lower limbs, resulting in greater swelling in the left leg than the right. Local massage can help alleviate symptoms.

　　2. Varicose veins: This condition may result from heavy physical labor, family history, obesity, and other factors. Common symptoms include more pronounced swelling in the left leg, local redness, and skin itching. Medications such as calcium dobesilate dispersible tablets or diosmin tablets may be used under medical guidance.

　　3. Myofascial inflammation: Myofascial inflammation in the left knee due to osteoarthritis may trigger inflammatory responses leading to greater swelling in the left leg. Patients should maintain warmth, balance work with rest, strengthen physical fitness, and avoid excessive exercise or fatigue. When myofascial inflammation occurs, medications such as loxoprofen sodium or diclofenac sodium may be used as directed by a physician.

　　4. Aseptic inflammation: Minor trauma may cause aseptic inflammation in the left lower leg, resulting in micro-injuries to ligaments and muscles and causing the left leg to swell more than the right. Patients should follow a light diet—such as consuming millet porridge—and avoid irritating foods that could worsen the condition. Additionally, patients should develop healthy lifestyle habits, get adequate rest, and avoid staying up late. For aseptic inflammation caused by sprains, if pain occurs, medications such as ibuprofen sustained-release capsules or indomethacin capsules may be used under medical supervision.

　　5. Vascular-origin edema: Due to human anatomical structure, the left common iliac vein crosses beneath the left common iliac artery, where arterial compression of the vein impairs venous return. This makes the left lower limb more prone to deep vein thrombosis, venous reflux obstruction, incompetence of deep venous valves, or great saphenous vein varicosities, leading to greater swelling in the left leg. Wearing compression stockings can help reduce swelling. For edema caused by deep vein thrombosis or impaired venous return, medications such as enteric-coated aspirin tablets or clopidogrel hydrogen sulfate tablets may be used.

　　Patients are advised to seek timely medical attention when experiencing discomfort and receive standardized treatment under professional guidance to promote recovery.