A bout of vague pain in the breast is usually indicative of breast hyperplasia, which is a benign lesion also known as lobular hyperplasia, mammary hyperplasia, cystic hyperplasia of the breast, and so on. It is usually associated with estrogen levels in the patient’s body. When estrogen levels rise during the pre-menstrual period, there will be cyclic pain in the breasts, usually paroxysmal, like pins and needles. On physical examination, there is usually no obvious lump in the breast, and only a sandy feeling can be felt. When the estrogen recedes to normal levels after menstruation is over, the breast pain can usually be relieved on its own. You can also go to the hospital for a checkup, usually using a breast ultrasound to see if there is a lump in the breast. If it is clearly diagnosed to be caused by breast hyperplasia, it is necessary to take oral Chinese medicines to treat the symptoms, for example, you can take red gold knot-eliminating capsules or free pills and so on.