This has just come on today but is painful enough for me to feel concerned about it. It just feels tender and aches behind the nipple, but I can't feel any lump/swelling and it looks completely normal.
I stopped breastfeeding a year ago, but it feels a bit like mastitis - altho' without any redness or specific tender places. I don't feel 100%, but that may not be related.
Could it just be hormonal? If so, would it only be on one side? Should I see a GP or wait and see what happens?