Tingling in the mammary glands when pressed can be caused by women in special periods, mastitis, breast hyperplasia and other reasons. 1. Women in special periods: during menstruation, ovulation, pregnancy and other special periods, the body’s estrogen, progesterone, prolactin and other hormone levels rise, nipples gradually increase in size, swelling, pain when touched, areola color deepening and other changes. 2. Mastitis: Inflammation of the mammary glands may lead to the appearance of hard lumps inside the breasts, a tingling sensation when the breasts are pressed inside, and localized redness of the skin and other symptoms. 3. Breast Hyperplasia: The pain caused by breast hyperplasia is usually cyclical, and the pain is obvious before menstruation, and it is also painful when the breast is pressed. Patients with breast pain may also suffer from breast malignant tumors, breast trauma, etc. It is recommended to consult a doctor as soon as possible for a clear diagnosis and treatment in order to avoid delaying the condition.