Needs evaluation!: There are a few causes of spontaneous breast enlargement: pregnancy (!), puberty, or an imbalance of sex hormones called gynecomastia, cancer. I think your hormones are out of whack. The associated pain is concerning, and the fact that you have pain when you breathe suggests involvement of the lung or lung lining/pleura. This all needs careful evaluation by your doctor. Be seen now! Good wishes:)
Answered 12/7/2015
1.9k views
See physician: Pain on breathing can be due to a viral infection of the lining of the lung(pleura) called viral pleurisy. On occasion it can be due to muscle strain in the chest wall or a pulmonary embolus. Breast cysts can cause pain in various areas of the breast. If persistent see your physician
Answered 12/12/2015
1.9k views
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