Symptoms like a tendon pulling on the inside of the left leg from time to time may be caused by certain physiological reasons, such as prolonged overexertion, exposure to cold and so on. It may also be a symptom of certain diseases, mainly lumbar spinal stenosis, lumbar disc herniation and other diseases. 1. Physiological reasons: prolonged overexertion may cause damage to the nerves and cartilage tissues of the left leg, and the damaged tissues may rub against each other when the left leg is moving or walking, which may result in the symptom of pain in the left leg as if there is a tendon tugging at it. When the left leg is stimulated by wind and cold, the local cartilage tissues may also be damaged, resulting in swelling, stabbing pain, dull pain, and pain on the inner side of the left leg like a tendon pulling pain. 2. Lumbar spinal stenosis: lumbar spinal stenosis is easy to compress the sciatic nerve, causing nerve paralysis, pain symptoms, which may lead to symptoms of distal limb pain, resulting in symptoms like a tendon tugging pain in the left leg. 3. Lumbar disc herniation: the typical symptom of lumbar disc herniation is sciatica, and if this pain symptom is not treated in time, it may involve the nerve tissues of the left leg, leading to the symptom that the patient’s left leg feels like a tendon tugging at the pain. In addition to the above reasons, there are other diseases with this symptom, such as sciatica and pyriformis syndrome. If you experience symptoms like a tendon pulling on the inside of your left leg, rule out physiological causes and go to a regular hospital in time. In addition, after the pain symptoms are relieved, you should also pay attention to more rest, to avoid exertion, which is harmful to health.