Tight Throat More Condition_symptoms How Do You Get The Tight Feeling Gone In The Throat When Singing?

How do you get the tight feeling gone in the throat when singing? - tight throat more condition_symptoms

In class or even try to learn, but there is this feeling of tightness in the neck when I hit the high notes .. Does this mean that you can open your mouth? It's like Sining at the back of the neck.