I am married 28 years old female. my mother was diagnosed with breast cancer 4 years back. mujy aksar underarm mein is tarhan k danay bantay hein. is k elawa kabhi koi gilti vagera nahi feel hui but ye aksar banty hein. mostly on left side aur kabhi kabhi right mein b..Kya ye cancer ka early symptom ha?.ya iski koi aur vajah ha?kindly guide me