I'm curious about gum inflammation and root canal treatment.

Hello, I am one of those people who really dislike going to the dentist. When I received treatment as a child, the pain must have become a trauma. These days, my teeth are in poor condition, and I feel a cold sensation in my molars when I drink cold water. Also, on my upper front teeth, I notice pus-filled bumps that look like pimples. Even when I squeeze them, they come back. What kind of treatment should I undergo? Since my gums are not healthy, is there any medication like Insadol? I think I should muster up the courage and go to the dentist.