There is a lump under my left breast. It seems to be filled with yellow liquid or pus. It is very painful during any physical activity. It has once happened in 2014 and again it happened this time. Last time I consulted homeopathy and took hepar sulph.. Which resulted in total pus discharge with blood. And slowly it was healed. But this year again it happened 3 days back when I had worn a very tight bra.. The lump seemed to be formed and there is reddish around it.