Sounds like back strain. If you haven't been lifting anything recently, or if you haven't fallen recently, then it could be a kidney infection. See you doctor.
Not enough sex.
Back pain lower right side causes are: Lower back and kidney disorders.
The lower back or lower sides.
The loins are the sides between the lower ribs and pelvis, and the lower part of the back.......
You could have a slipt disc in your lower back, they are very painful.
r'patz is tickalish on the sides of his stomach and lower back and ?
Have your gall bladder checked.
sciatica
Pain in lower right and/or left sides.
One can find information about the causes of lower back pain from the following sites; Chronic pain site, WebMD, Mayo clinic, Bupa, Health guide, and NHS.
Pulsating sprinkler tangles back and forth as it rotates to water across your lawn. This has a standardized faucet connected to the opening close to the bottom of the metal or plastic. Two or more pulsating sprinkler can be connected together using numbers of water hoses.
LABOR
well it could be a pulled muscle or a kidney infection...call your dr.