Yes I have had many smooth movable lumps and all have been nothing to worry about.  

Are you post menopausal?

At 54 you may have already had a mammogram, if so how long ago ?

Yes I’m post menopausal .

awww have you? This one just came out of nowhere!! I’m sure my last mammogram was around 5 years ago - I got one booked straight away when this lump appeared. 

do your lumps just go on their own?