Re: Small bump on back of throat
Sinus drainage probably is making throat irritated. Irrigating sinuses with saline solution will help reduce the amount of drainage. Sleeping with head elevated will help. Taking a good antihastimine will help the problem.
For immediate relief gargle with Listerene mouthwash, and at bedtime take 1/2 to 1 teaspoon plain Robitussin to coat throat and help keep mucous thinned. Also Mucinex helps to keep mucous thinned too.
Best is to see the doctor for proper diagnosis.
Much will depend on exactly what you are seeing and calling a bump.