Answer: Lumbosacral strain
Explanation:
Lumbosacral strain refers to an injury which leads to low back pain. It should be noted that strain simply means the tearing of the tendons or muscles.
Lumbosacral strain can be caused when a person stands or sits in the same position for a long period of time. It can also be caused by poor posture, accidents or fall.
The symptoms include pain in the back, inability to freely move, and swelling of affected part.
Common treatments include cold or heat packs, stretching exercises, prescription of medicines such as nonsteroidal anti-inflammatory drugs in order to reduce inflammation, and swelling.