Re the mother nursing an almost 3 YO who developes sore nipples each time she ovulates...... Soreness can last for up to 2 weeks and clears by itself with no treatment sometimes overnight or gradually...... soreness is extreme and it can become too painful to nurse. Also hurts even when not nursing. I know of several non-lactating women who have developed acutely sore nipples on the inside (no external sign) on exactly the same monthly pattern you describe. On the advice of a doctor specialising in women's health, Evening Primrose Oil, 1 capsule per day, cured it from the first cycle. I posted about this some months ago. Ros Escott Tasmania Australia