4. Lower Back or Pelvic Pain

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Persistent lower back or pelvic pain—especially if felt on one side—could be a sign of muscle-invasive bladder cancer. This occurs when tumors grow deep into the bladder wall or spread to nearby organs, nerves, or lymph nodes. The CDC notes that over 25% of cases are diagnosed after cancer has spread, when symptoms like pain become more severe. Unfortunately, late-stage diagnosis is associated with lower survival rates and higher treatment costs. Advanced therapies such as radiation therapy, targeted drugs, or even bladder reconstruction may be needed, often involving out-of-pocket costs if coverage is limited. If pelvic or back pain persists and isn’t explained by other issues, ask your doctor about a bladder cancer risk assessment.