Lymph nodes in the armpit will not necessarily turn into cancer, because normal people also have lymph nodes in the armpit, sometimes such as inflammation can also cause axillary lymph node enlargement, women have breast hyperplasia or parammary hyperplasia, there are bilateral axillary small lumps and so on, you can do a preliminary diagnosis of ultrasound, consider inflammation, you can also treat inflammation, the lymph nodes will be reduced a little bit. In addition, if you want to clarify the pathology, you have to remove the lymph nodes, that is, surgical biopsy, and then do the pathology examination to confirm the diagnosis, such as puncture cytology, may also have a certain effect. However, the accuracy of puncture is about 90%, which is not as high as the accuracy of biopsy.