What causes dizziness and weakness in both legs?

Generally, dizziness and weakness in both legs may be caused by factors such as lack of sleep, malnutrition, dehydration, anemia, or cervical spondylosis. Symptomatic management through general treatments or medication may be necessary. If symptoms persist, it is recommended to seek medical attention promptly and undergo appropriate treatment under a doctor's guidance. Detailed explanations are as follows:

1. Lack of Sleep

Long-term late nights or poor sleep quality can lead to brain fatigue and affect the normal functioning of the nervous system. The body also experiences fatigue due to insufficient recovery time, manifesting as symptoms such as dizziness and weakness in both legs. These symptoms may be accompanied by difficulty concentrating, memory decline, and mood swings. It is recommended to improve sleep habits, maintain a regular sleep schedule, create a comfortable sleeping environment, and avoid using electronic devices before bedtime.

2. Malnutrition

An unbalanced diet lacking essential nutrients such as protein, iron, and vitamins can affect the body's normal metabolism and functions, leading to symptoms such as dizziness and leg weakness. This may be accompanied by weight loss, dry skin, and brittle, discolored hair. It is recommended to adjust the diet, increasing the intake of nutrient-rich foods such as eggs, pork liver, and spinach.

3. Dehydration

Dehydration refers to excessive loss of body fluids without timely replenishment. When the body lacks water, blood loses moisture, becomes thicker, and circulates more slowly, reducing blood supply to the brain and limbs, which can cause dizziness and bilateral leg weakness. Other symptoms may include thirst, reduced urine output, and dark yellow urine. It is recommended to replenish fluids promptly by drinking water or electrolyte beverages in appropriate amounts to restore the body's fluid balance.

4. Anemia

Anemia refers to a condition in which the number of red blood cells or the level of hemoglobin in the blood falls below normal. When red blood cell count or hemoglobin levels are insufficient, tissues and organs cannot receive adequate oxygen, causing symptoms such as dizziness and leg weakness. Symptoms may also include pale complexion, fatigue, and rapid heartbeat. It is recommended to follow medical advice and use medications such as Compound Ferrous Sulfate Granules, Iron Dextran Tablets, or Iron Sucrose Injection for treatment.

5. Cervical Spondylosis

Cervical spondylosis refers to degenerative changes in the cervical intervertebral discs or bone spurs, which may compress the nerve roots or spinal cord in the neck area, affecting nerve conduction between the brain and lower limbs, leading to dizziness and bilateral leg weakness. This may be accompanied by neck pain and arm numbness. It is recommended to follow medical advice and use medications such as Chlorzoxazone Tablets, Eperisone Hydrochloride Tablets, or Sodium Naproxen Tablets to relieve symptoms.

In terms of lifestyle habits, it is recommended to ensure sufficient sleep, aiming for 7–8 hours daily, to allow the body adequate rest and help alleviate symptoms.