If there is a new change, lumps or other unusual signs in your breasts, talk to your doctor promptly. (mayoclinic.org)
Make sure you see your doctor anytime you see unusual signs like sharp pains or bleeding. (natural-parenting-advice.com)
If a kitten has trouble breathing or eating, or if it has fleas, a discharge or any other unusual signs, take the animal to see a veterinarian. (mnn.com)