Girls, save... everything was normal with my breasts, we were on bed r…

Girls, save... everything was normal with my breasts, we were on bed rest, yesterday we went for a walk, the wind was strong I suppose she could catch a cold probably, came home one breast hurts and where it hurts red (by the way, soft like there are no lumps that I notice yet. Please tell me, who has encountered this, what to do so as not to prevent mastitis etc? I read that he seems to start like that ???