
Hi Raphael, don't want to alarm you but mastitis can be a very nasty infection & even life threatening in very severe cases (this is rare, but can happen). It is important to monitor any bitch carefully for signs of mastitis & if it's caught early, this is beneficial. (although, even if it's noticed in the early stages, it can still become very nasty)
Treatment will usually be, (depending on the severity) hot flannels (as hot as your hand can stand) this will help to get the milk flowing, & is soothing. Also raw cabbage leaves placed directly onto the mammaries, - strange I know, & I laughed when I first heard it, but I don't think it's an old wives tale, I think it really helps (& anything is worth a go)- some natural ingredient in the cabbage helps. Also antibiotics & sometimes painkillers & or anti-inflams.
Quite often if the pups are put on the teats for a good feed, that'll settle the mammaries down & they were probably just very full, but if not the most important thing is to contact the vet as early as possible if mastitis is suspected.
Another sign of mastitis is a high temperature.
Hope this is helpful.
snoopy. :)