Female lumbar distension can be caused by the following reasons: 1. tumors of the kidney, kidney tumors can lead to kidney distension, painful symptoms, there can be hematuria, then we should check the ultrasound, CT and MRI of the kidney for diagnosis and early treatment; 2. tumors of the lumbar muscle, when there is a tumor growing in the lumbar muscle, there can be symptoms of lumbar distension, then the body can touch the obvious swelling, then we should check the ultrasound and MRI of the lumbar muscle for diagnosis and early treatment; 3. When there is a tumor growing in the lumbar muscle, there can be symptoms of lumbar distension, which can be accompanied by lumbar pain during the acute attack, so we should check the body and examine it early to exclude other diseases for diagnosis.