How can i alleviate arthritis in my lower spine?

You can't: Basically, arthritis is a process that is not reversible. You can diminish symptoms with exercise, medications, and avoidance of activities that provoke more pain. However, there are certain forms of arthritis that are amenable to specific therapy that can slow or halt the inflammatory process. Also, not all back pain is due to arthritis.

Exercise: See a physical therapist who can show you exercises to help reduce low back pain. Try moist heat before exercising. Swimming can be a great exercise for people with low back pain as well. Acupuncture can be quite effective in managing low back pain. Discuss these options with your doctor.

Degeneration: Strictly speaking, arthritis refers to pain/inflammation in joints. In reference to the spine, most doctors are simply referring to degeneration, or aging changes, when applying a diagnosis of arthritis. In general terms, treatment options include physical therapy, increased activity, regular exercise, weight loss, improved diet. Beyond that, medications and injections are also options.