No, the two topics are not related, but I wanted to add to the two
discussions.  Regarding the curly hair issue, I am a former blonde with such
naturally curly hair as a toddler that it was in ringlets.  The color darkened
over time (now it's medium brown) and the curls became more waves.
With pregnancy and nursing, from roughly 1978 to 1988, my hair became
quite straight (and, incidentally, took a "perm" almost too well; I'd have ma
masses of curls in no time flat).  In the past few years (I'm now 50 years old
and almost praying for a small sign or two of menopause, but no such luck)
my hair has become quite curly again.  Beats me what this is due to, but it's
nice not to have to fuss with a hairdo!

Regarding the mastitis discussion, far be it from me to contradict Dr. Jack,
but
in my neck of the woods (northwest WA state, USA),  cephalosporins are
used for mastitis, but many physicians prefer dicloxacillin because it is so
widely distributed  into tissue (I hope I'm remembering this correctly)  and
because it is usually cheaper.  (My family physician husband and I had some
discussions about this very issue when moms were given other, sometimes
outlandish Rx's for mastitis, especially by ER/ Emergency Room docs and ID/
Infectious Disease specialists).  Perhaps amoxicillin has a similar tissued
distribution??

Jeanne M. Brotherton, RNC, IBCLC
The Fourth Corner of the USA!!