Pulled muscle in lower side back?

Not sure what your question is but if you have a pulled back muscle, you should rest the area-no strenuous exercise or heavy lifting until it feels better. You should put heat to the area, take acetaminophen or ibuprofen per package instructions and then you can gently stretch the area to hopefully relieve it. Hope this answers your question. Good luck!

See your regular physician, consider physical therapy depending on severity and duration, and consider possible imaging depending on clinical findings and the persistence of symptoms.