The stabbing pain on the left side of the breast can be caused by a variety of reasons, as follows: 1, breast hyperplasia: stabbing pain is the most common, stabbing pain caused by breast hyperplasia, mostly intensified before menstruation, after menstruation to reduce or disappear. 2, breast malignant tumor: when the malignant mass of the breast erodes the nerve endings, the stabbing pain in the breast can occur. 3, rib fasciitis: although there is no obvious mass in the breast, but there is deep rib pressure pain, consider the presence of rib 4, herpes zoster: stinging pain is obvious and accompanied by skin herpes to pay attention to herpes zoster in the breast. Regardless of the cause of the breast tingling, it is recommended to do all aspects of breast examination to determine the cause, and to develop appropriate treatment plans for the cause in a timely manner to avoid delays.