Sudden softness in walking on the left leg may be due to hypokalemia, meniscus injury, lumbar spinal stenosis and other reasons.
1. Hypokalemia: When the blood is low in potassium, resulting in the lack of potassium ions inside and outside the cells, such as the neuromuscular system, cardiovascular system and endocrine metabolic system will be dysfunctional, and when the neuromuscular system is abnormal, the phenomenon of a sudden weakness of the legs when walking will occur.
2. Meniscus injury: meniscus injury patients walking between the tibia and femur will produce pressure, stimulate the meniscus to produce obvious pain, the human body to this pain will produce instinctive response, that is, the muscles are in an instant state of relaxation, which will lead to a decline in the strength of the muscle support, resulting in the emergence of sudden weakness of the legs.
3. Lumbar spinal stenosis: lumbar spinal stenosis will continue to compress the nerves, is a chronic cumulative disease, there will be serious inflammatory edema, which will lead to the patient in the walking leg suddenly soft, and even the phenomenon of kneeling down on the ground, mainly related to the nerve severe ischemia, hypoxia.
Left leg walking suddenly soft for a moment may also be the knee osteoarthritis, lumbar disc herniation, strenuous exercise and other causes, if the symptoms are serious, should go to the hospital in time to consult, clear causes given after standardized treatment.