A tendon pain at the back of the left leg may be caused by lumbar disc herniation, muscle strain at the back of the leg, and pear-shaped muscle syndrome.
1. Herniated lumbar intervertebral disc: Frequent bending and heavy labor can easily cause the nucleus pulposus of the lumbar intervertebral disc to protrude into the annulus fibrosus, which then compresses the sciatic nerve around the lumbar vertebrae, causing sensory abnormality in the area innervated by the sciatic nerve, which will cause pain in the back of a tendon of the left leg.
2. Muscle injury at the back of the leg: Excessive external pulling force or irregular exercise will lead to injury of the muscle tissue at the back of the leg, local congestion, edema and other inflammatory reactions, and affect the surrounding fascia and ligamentous tissues, resulting in pain at the back of the leg.
3. Piriformis syndrome: Hip sprain, squatting with heavy loads and other factors can easily lead to injury of the piriformis muscle, and local congestion and edema and other reactions, so that the sciatic nerve around the piriformis muscle is squeezed and cause pain in a tendon at the back of the leg.
If the symptoms persist, you should go to the hospital in time, after clarifying the cause of the disease, under the guidance of the doctor for targeted treatment.