Throwing out your back usually means you've strained the muscles in your back. Lifting heavy objects or bending forward in an awkward position are common muscle strain causes. The pain that muscle strain produces is usually right around your lower back and no further.

What does it mean to throw out your back?

Throwing out your back is characterized by a sudden, severe pain in your back. This usually occurs in the lower back, and happens during physical activity. It can be caused by a muscle spasm, arthritis, a slipped or ruptured disc, or the cause can remain a mystery. The most common cause is muscle strain or spasm.

How long does a thrown back take to heal?

Back pain from a thrown out back should go away within 1–2 weeks and should not cause other symptoms. If pain lasts longer or other symptoms are present, a person should talk to their doctor as soon as possible.