Hi there.  I seem to suffer with breast cysts as well.  Since my first mammogram 4 years ago at 50 I have always been recalled back to breast clinic for re-assessment.  My last mammogram was 2 years ago and I was called back again.  Another cyst that was drained.  I think I've now got another one that feels like a smooth pea in my left (where one was previously drained).  Trouble is this time I've got a swelling in my left armpit too.  Not a lump but just swollen so GP now referred me again and urgently.  It's very much 'here we go again'.  If it gives any reassurance at all then my experience is yes, cysts can keep returning.  When mine were drained the fluid looked different each time but Dr said ok and I didn't need a biopsy.  If im honest im worried they've missed something despite my mammograms.  To be recalled EVERY time suggests to me that something looked wrong.  It's a worry and just before Xmas too!