person A: I have a dentist appointment next week. I hate going to the dentist. I don't want to go.
person B: I went through that for like 5 years.  Ended up finally going and they've made a lot of advances in comfort since I last went before that.
person A: I have a tooth that has been bothering me and I've already put this off for so long.
person B: Yeah_comma_ you should definitely bite the bullet (metaphorically).  It'll only get worse from here if you don't do anything_comma_ and it probably won't be as bad as you worry.