Slight pain in the breast is commonly caused by the following etiologies: for example, excessive running and exercise in general, not wearing proper sports underwear, which tends to lead to excessive pulling of the mammary ligaments, resulting in mild pain, which can be relieved soon after resting or localized hot compresses. Localized pain caused by localized compression, impact, or trauma to the mammary gland, with a clear history of trauma, can be relieved in a few days. If the injury is more serious, oral medication to activate blood circulation and relieve pain is needed. It can also be seen in cystic hyperplasia of the breast caused by pain, pain has a clear cycle, accompanied by the menstrual cycle, after the onset of menstruation, the symptoms are significantly relieved, you can take oral medication for symptomatic treatment, ultrasound examination, regular follow-up. Acute mastitis can also present painful symptoms, localized redness, swelling, heat and pain, it is recommended to go to the hospital to consult and confirm the diagnosis.