A hard lump in the breast before menstruation is usually caused by cystic hyperplasia of the breast, which is often caused by a high secretion of estrogen and a relatively low secretion of progesterone. Clinically, it is especially evident before menstruation when a hard lump is felt on the breast. It is advisable to have an ultrasound examination of the breast after menstruation or a mammogram to understand the nature of the lump. If the lump is cystic hyperplasia, you can clinically take the Plus Flavor Easy Pill for treatment, and it is recommended that you must live a regular life in daily life, do not stay up late, and keep a happy mood. In addition, it is recommended to eat less spicy and acidic stimulating food.