Here's why:
* "Vieja" is a derogatory term for an older woman, often used in a rude or dismissive way.
* The tone of the phrase is aggressive and confrontational.
* The context is likely one of anger or frustration.
Instead of using this phrase, it's better to express your concerns or questions in a respectful and appropriate way.
For example, you could say:
* "¿Qué te pasa?" (What's wrong?)
* "¿Qué te ocurre?" (What's happening?)
* "¿Hay algún problema?" (Is there a problem?)
It's always best to communicate with others in a way that is respectful and considerate.