Frequent flash to the waist may be due to poor lumbar strength, age factors, lumbar muscle strain and other reasons. 1. Poor lumbar strength: mainly because of the lumbar muscle strength caused by less physical exercise, the lumbar bearing capacity is insufficient during exercise or activities, lumbar pain, restricted activities, and often flash to the lumbar phenomenon. 2. Age factor: as middle-aged and elderly people grow older and reduce their activities, the lumbar vertebrae may experience natural degeneration and decrease in the strength of the surrounding muscles, which may result in frequent flashes of the waist to the phenomenon. 3. Lumbar muscle strain: long-term excessive exercise or heavy physical labor, resulting in chronic injury to the lumbar muscles and their attachment points of fascia or periosteum inflammation, inflammation of the stimulus, can lead to degenerative lumbar vertebrae, so that the lumbar region is stiff, activity is limited, the lumbar region will often flash to the phenomenon. Frequent lumbar flash can also be seen in other causes, it is recommended that patients go to the hospital in a timely manner, follow the doctor’s instructions for treatment, to avoid delaying the condition.