What can you do to treat a lower back strain?

Conservative care: Often times, conservative treatment such as physical therapy (including strengthening and stretching) and anti-inflammatory medications will work. It would also be reasonable to try massage, ice or heat, or over the counter creams such as aspercreme or capsaicin creme. See a physician if your symptoms do not improve - an MRI may be needed for further evaluation.

Back Strain: Low back pain is a fact of life. Just about everybody will suffer from it sooner or later. One of the main causes of back pain, whether acute or chronic, is low back strain. http://www.webmd.com/back-pain/guide/low-back-strain