I am getting swelling over my face followed by toothache. Why?

Hi,

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The swelling that you have seems to be an abscess or pus due to infection. This infection is most likely due to your tooth decay over a long period of time, which has spread to bone and around your soft tissues like muscles. In the face region, swelling increases rapidly in size due to multiple natural pathways that connect each other. It is a potentially dangerous situation. The abscess needs to be drained quickly. If allowed to progress, then it may lead to infection spreading to brain or even may lead to breathing difficulty. I suggest you antibiotic Augmentin 625 mg twice daily along with analgesics. Contact an oral surgeon or a dentist as soon as possible for physical evaluation and take the medicine with consent. Follow up and get the tooth treated once infection subsides. Do warm salt water rinses and apply ice to the swelling. Do not apply heat as it will spread the infection further.