The right side of the body feels a tendon uncomfortable may be due to acute lumbar sprain, lumbar disc herniation and lumbar fasciitis and other reasons. 1. Acute lumbar sprain: it may be due to frequent bending to carry heavy objects, or bending to pick up things, in the process of reaching for things, one side of the lumbar muscle strain. If the right side of the lumbar muscle strain, it will be manifested as the right side of the body feels a tendon uncomfortable phenomenon. 2. Herniated lumbar intervertebral disc: these patients may have rupture of the annulus fibrosus, herniation of the nucleus pulposus, etc., which in turn compresses the nerve root and causes discomfort in the right side of the waist. 3. Lumbar fasciitis: caused by long-term exposure to cold or by poor posture triggered by lumbar fasciitis. When the deep lumbar fascia has aseptic inflammation, the right side of the body may feel uncomfortable with a tendon. Therefore, if the above symptoms occur, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease and target treatment.