Hello, why is my mothers philtrum numb all of a sudden? she said it feels like when you get a shot at the dentist office.

Examination: Your mother needs to be examined, so start with a dentist. Without knowing any factors that could be contributing to this issue, that's her best course of action.

Numbness: Could be result of dental or medical problem. It can't be diagnosed over the internet. Have her see a dentist asap to begin the process of diagnosis and treatment.

2 possibilities: 2 possibilities come to mind. One is dental cause such as infected tooth or gums. The other is neurologic such as stroke. Please take your mom to both her General Dentist and her General Physician. If she has any other symptoms such as muscle imbalance, speech difficulties, cognitive problems, go immediately to ER.