Photobiomodulation Therapy for the Management of Breast Cancer-related Lymphedema

This study tests whether photobiomodulation therapy (low-level light therapy using a special device) can help treat lymphedema — painful arm swelling — that develops in breast cancer survivors after surgery and radiation removed or damaged lymph nodes. **You may be eligible if...** - You have been diagnosed with breast cancer - You had a lumpectomy or mastectomy plus lymph node surgery (sentinel biopsy and/or full dissection) - You received radiation therapy (with or without chemotherapy) - You have been diagnosed with breast cancer-related lymphedema (stage I or higher) - You are 18 or older **You may NOT be eligible if...** - Your breast cancer has spread to other parts of your body (metastatic) - You are pregnant - You have had prior surgery or trauma to the affected arm - You have had an arm infection in the past 3 months - You take medications that affect body fluid (like diuretics) Talk to your doctor to see if this trial is right for you.