i am 34 years old i found a small movable lump under my left armpit a week ago . i am waiting my period in the following couples of days and i am having a very hard pain in both breast as i often have. i have been shaving and using deodorant before getting the lump i stopped that since one week.
It can be swollen lymph node due to infection or some subcutaneous lesion such as fibrous or lipoma. It can be surgically managed, or you can do ultrasound with needle biopsy before it.