Older people who have difficulty sitting and lying comfortably may be related to overwork, lumbar muscle strain, lumbar spinal stenosis and so on. 1. Excessive exertion: strenuous exercise or excessive walking will lead to excessive muscle strain, thus affecting the activities of the elderly, making it difficult to sit and lie down comfortably. 2. Lumbar muscle strain: long-term bending activities or use the waist for labor activities, will lead to lumbar muscle injury, which causes lumbar intervertebral disc structure degeneration, resulting in lumbar soreness and pain and other discomforts, which in turn will cause the elderly to sit uncomfortable lying comfortably. 3. Lumbar spinal stenosis: lumbar spinal stenosis occurs when the lumbar spinal canal is narrowed, it will compress the surrounding nerves and blood vessels, so that the lumbar local blood circulation is insufficient, which will cause the elderly to lie down comfortably sitting uncomfortable situation occurs. In short, there are many reasons for this symptom, so it is recommended to go to the hospital in time for examination.