Does your doctor tell you what the lumps are? Are they cysts, Fibroadenomas, cysts, or what? There should be an explanation as to why they keep recurring. Are you on birth control pills? For fibrocystic changes, birth control pills are often helpful. Other women are helped by:
Avoiding caffeine and chocolate
Limiting fat and increasing fiber in the diet
Taking vitamin E, vitamin B complex, or evening primrose oil supplements