Hi Carrie Ann!
-Discontinuing breastfeeding because of mastitis, plugged ducts or breast
infection is the worst thing that the mother could do and can lead to breast
abscess which is even more painful.  Breastfeeding can usually continue after
surgery for breast abscess as well depending on where the incision has been
made.
-Nurse frequently and use various nursing positions to gain optimal access to
all milk ducts.
-If the mother reports a fever, she needs to be referred to her doctor and if
he determines that she requires antibiotic treatment (which is typical) - the
medication needs to be compatible with breastfeeding.
-Preventive measures:  Avoid the following: too tight bras, restrictive
clothing, pressure on the breast/s while sleeping, engorgement, switch
nursing, irregular nursing, poor positioning, stress or illness such getting
a cold or being exposed to other family members with colds or flu, the use of
nipple shields and overdoing it or feeling run down and fatigued.
-If baby refuses the affected breast or is less than eager - preferring to
nurse on the 'good' side - because of flavor changes of the milk, the mother
will need to pump / express to keep the affected breast as 'empty' / soft as
possible and keep encouraging the baby to go back to that breast as she heals
and the milk flavor returns to normal (usually within a few days to a week).

-It is very important for the mother to follow her doctor's instructions
about finishing her medication to avoid relapse.

Hope this helps!
Leona Simoes, LLLL