The most concerning causes of sacral edema as it is called, are related to changes in the hydrostatic forces in your blood vessels. These may include but are not limited to congestive heart failure, liver cirrhosis and nephrotic syndrome. See your doctor.
A possible cause could be a condition called Spondylolysis which affects mainly growing adolescents. It is caused by the bending and twisting of the back, cricketers would suffer from this condition and the only way to repair the back is by rest for six weeks and to have treatment by a physiotherapist.
A swollen lower back could indicate many things.The most likely is a bruised or strained muscle or ligament. Although there may be no present pain or other indicators of the forementioned, there could very well be some strain. I recommend icing the area for 20 minutes at a time 4 times a day minimum to bring swelling down.
Try to remember if you banged or had a fall. Swellings take time to appear after the hit. Perhaps, these are fat deposits that give you a feel of swelling.
if you are having a long time sleeping or lying on bed, the lower back may not receive enough blood to supply it, causing fluid shifting and edema or swelling
I have a swollen lower back from lifting weights in the gym. I didn't properly engage my abdominal muscles and legs while lifting, causing me to strain my lower back.
I have the same Problem, only mine has been hurting for two weeks, hurts to lift my son up and to top that off I have spina bifida, and its right where the hole is.
