Why are my breasts sore before a period? By Lizzy on December 15, 2018 Fluctuations in hormones before a period are a common cause of sore breasts. In this article, learn more about why breast pain or tenderness often occurs before a period. Source: MedicalNewsToday.com Published in Health News Lizzy More from Health NewsMore posts in Health News »Largest COVID Vax Safety Study; Kratom Deaths Rising; Gov. Threatens Hospital ChainLargest COVID Vax Safety Study; Kratom Deaths Rising; Gov. Threatens Hospital ChainFasting-like diet lowers risk factors for disease, reduces biological age in humansFasting-like diet lowers risk factors for disease, reduces biological age in humansJunk DNA in birds may hold key to safe, efficient gene therapyJunk DNA in birds may hold key to safe, efficient gene therapyResearchers are using RNA in a new approach to fight HIVResearchers are using RNA in a new approach to fight HIVNearly all doctors feel burnout, but many are encouraged by potential of AI, survey says