There is nothing in what you said that confirms this is actually
mastitis.  For example, there is no mention of fever being a part of
this syndrome.  What you describe could easily be recurrent blocked
ducts.  When blocked ducts recur frequently in the same place, it is
often useful to treat with ultrasound.  I have used this for some years
now, after hearing of its being used in Australia.  It works often
enough.  Therapeutic ultrasound can had in sports medicine clinics or
physiotherapy offices.  The physiotherapist will probably never heard of
this so here is the dose:

2 watts/cm sq., continuous, for five minutes to the affected area, once
daily.  One dose will usually settle the blocked duct; if not, a second
dose will usually do it the next day.  If not reevaluate, do not
continue with the ultrasound.  This procedure usually settles a blocked
duct that does not resolve in the usual 24-48 hours, but interestingly,
if the blocked ducts usually occur in the same area, seems to prevent
them from returning.

        If you wish, as the physician to contact me.  I have voice mail at
(416) 813-5757 (option 3).

Jack Newman, MD, FRCPC