Lump on upper arm..radiating pain under breast, along right side of rib cage and upper arm. Doctor sent me for Breast Exam two years ago when it wasn't too painful, nothing found.
Just one month ago, had to get mole removed and sent for testing from my leg. All my bloods are 'normal'. But the pain in my arm is getting worse.
Doctor says it may be a cyst on a nerve. Should I get a second opinion or does it sound like a cyst?
Thank you for your help.