Low back pain, also known as lumbago, is a common complaint that affects millions of people worldwide. There are many different ways to describe this condition, and there are also many synonyms for low back pain. Some commonly used synonyms for this condition include lumbar pain, lower back ache, lumbar backache, and lumbosacral strain. Other terms that are sometimes used to describe low back pain include spinal pain, sacral pain, and lower spinal pain. Regardless of the specific term used to describe the condition, low back pain can be a serious and debilitating condition that can affect a person's quality of life, so it is important to seek medical attention if you are experiencing persistent pain in this area.