Why does leg pain occur after taking aspirin?

Generally, taking aspirin does not cause leg pain. Therefore, leg pain may be related to factors such as lactic acid buildup, muscle strain, trauma, lower extremity venous thrombosis, or lumbar disc herniation. Symptomatic treatment is required, and the specific analysis is as follows:

1. Lactic Acid Buildup

If one engages in prolonged intense exercise, the body may produce excessive lactic acid, which accumulates in the leg muscles and causes leg pain, often accompanied by fatigue. Massaging the legs with hands can help improve local blood circulation and promote lactic acid metabolism, thereby relieving symptoms.

2. Muscle Strain

Incorrect posture during exercise or physical work may damage muscle fibers in the legs, leading to inflammation and causing symptoms such as leg pain, swelling, and limited mobility. Under a doctor's guidance, topical medications such as anti-swelling and analgesic tincture, diclofenac diethylamine gel, or ibuprofen cream may be applied to reduce inflammation and relieve pain.

3. Trauma

If an injury occurs during exercise—such as a fall—it may damage the skin and lead to leg pain. In such cases, pain-relieving medications such as ibuprofen sustained-release capsules or acetaminophen tablets may be taken orally as directed by a physician.

4. Lower Extremity Venous Thrombosis

Lower extremity venous thrombosis can also cause varying degrees of leg pain. To alleviate discomfort, medications that promote venous return—such as enteric-coated aspirin tablets or clopidogrel hydrogen sulfate tablets—may be taken orally under medical supervision.

5. Lumbar Disc Herniation

If leg pain is caused by sciatic nerve compression due to lumbar disc herniation, treatment may begin with neurotrophic medications taken orally under a doctor’s guidance. Commonly used drugs include mecobalamin capsules and vitamin B1 tablets, along with traction therapy.

In summary, aspirin does not cause leg pain. Therefore, if leg pain occurs, it is recommended to seek timely evaluation at a正规 medical facility and receive appropriate treatment based on the underlying cause.