No, caffeine doesn't appear to cause breast cysts (fibrocystic breast changes), a noncancerous (benign) breast disease. There's also no evidence to suggest a link between caffeine and breast cancer.
Anecdotally, some women report reduced breast pain when they go off caffeine. Although no research has documented this effect, there's no reason not to go caffeine-free to see if it relieves discomfort from breast cysts.
Aug. 01, 2013
- Diagnosis of breast disease. Bloomington, Minn.: Institute for Clinical Systems Improvement. https://www.icsi.org/_asset/v9l91q/DxBrDis.pdf. Accessed May 30, 2013.
- Non-cancerous breast conditions: Fibrosis and simple cysts. American Cancer Society. http://www.cancer.org/healthy/findcancerearly/womenshealth/non-cancerousbreastconditions/non-cancerous-breast-conditions-fibrocystic-changes. Accessed May 30, 2013.
- Pruthi S (expert opinion). Mayo Clinic, Rochester, Minn. July 3, 2013.