There is a girl in my class that is my friend. She was complaining that she had side pain and difficulty breathing. She went to the hospital and they said her lung collapsed naturally. They put a tube in her.
Is thjs normal for a 14 year old girl? She is vaccinated.
If by "normal" you mean "through natural processes" it can be "normal." If you mean "happens a lot," no, it isn't normal. I described one way, another way is through a disease process like cancer or fluid accumulation around the lung. Or injury from a projectile.