What's the best way to treat lower back pain if you're a weightlifter?

LBP: Do not think of low back pain(lbp) as a diagnosis but as a symptom. Pain in the lumbar spine can be caused by many factors. You stated that you are a weightlifter. (i also weightlift). If you perform squats ( hack or normal) and experience lbp then x-ray would be necessary to rule out spondylolisthesis/spondylolysis. If you experience lbp with pain/numbness down leg then seek medical evaluations.

Lifting injuries: Neck or back pain that starts with a lifting event usually suggests poor technique. Reaching away from the body, then bending/twisting while lifting is asking for problems. If pain is recent, in the midline, and getting better, then nothing to do. Rest, ice, otc pain meds, salonpas hot patches. Mckenzie pt if no better, but requires md prescription.