Can you fully recover from a bad lower back muscle injury?

Rest, ice, nsaids. In general you will need to rest and take it easy until the symptoms resolve. Depending on the severity of the injury you might need a few days of rest, or a combination of rest, ice nsaids and physical therapy to alleviate your symptoms. While the severity of lower back injuries varies greatly you must pay attention to your symptoms and return to activities gradually to prevent reinjury.