If women have armpit tingling, the more common causes, to be considered from the following three aspects: First, is the most common cause mammary gland hyperplasia, generally manifested as stabbing pain in the breast, sometimes will be the armpit pain, in the menstrual period performance more obvious, this is a normal physiological phenomenon, generally do not need to carry out special treatment. Secondly, there may be a case of parammary glands, normal people have two mammary glands, while some women can have parammary glands, in the two sides of the armpit grow other smaller mammary gland-like tissue, we call them parammary glands, parammary glands can appear hyperplasia, malignant change, etc., sometimes also cause pain. Thirdly, breast tumors can cause pain in the armpits. If women have armpit pain, they should go to a regular hospital to see a breast surgeon and have an ultrasound examination of the breast, generally if it is breast hyperplasia or parammary gland, it is a benign lesion and there is no big problem, but if it is a breast tumor, it needs early detection and early treatment.