The first time I had mastitis, the GP told me wearing tight clothing and a slightly smaller bra would help clear it.
The second time I had mastitis, another GP told me not to feed off the affected side.
The third time I had mastitis (both sides - what a laugh!) the GP mercifully kept his home remedies to himself.
Today, with my fourth case of mastitis festering away in my left boob, yet another GP told me that the reason I keep getting mastitis is because breastfeeding is not recommended after 6 months of age (DS is 13mo). When I told him the NHS advice is to feed until two and beyond, I was informed that was just for developing countries and that I needed to discuss my choice to continue breastfeeding with my HV or continue to get mastitis.
Four different GPs, three sets of awful, damaging advice. No wonder breastfeeding failure rates in the UK are so high. 
Nothing to ask, just needed a shocked vent. (And yes, I am trying to get in contact with the Breastfeeding Network to find out what the hell I'm doing wrong.)