Stabbing pain in the breast from time to time is a relatively common symptom in clinical practice, and its causes generally include the following two reasons: First, it may be cystic hyperplasia of the breast, which is mostly due to endocrine imbalance in the body, resulting in incomplete breast restoration or glandular hyperplasia, and will be more obvious before the menstrual cycle or during menstruation when the breast pain is more pronounced, and there is a paroxysmal-like stabbing pain, and after the menstruation The stinging pain in the breast will gradually ease or even disappear. Second, it may also be due to inflammation of the breast, including plasmacytoid mastitis, or acute mastitis, due to bacterial infection resulting in local inflammatory manifestations of redness, swelling, stinging and pain, which may require the application of antibiotics for symptomatic treatment, through local hot compresses and treatment to relieve pain and eventually achieve the purpose of complete cure. Therefore, it is best to go to a regular hospital for detailed examination to find the exact cause of the paroxysmal breast pain and to carry out systematic and standardized treatment according to the cause.