question: Hello Doctor. I am a Female,45 years old, married 2 Tnage children.Sometimes in the morning when I brush my teeth , my gums feel very sensitive and brushing hurts but no pain. At times I also see slight pinkish colour blood when I spit the foam.. Is this a worry? I brush twice a day also have 3-4 fillings.one of my tooth is extracted in the lower jaw next to my molar and there is gap. Dentist did ask me not to leave it empty it may losen other teeth, is this true? Thanks for your help and time, appreciate it.