Most cases of vertigo are not dangerous and are just more annoying than anything.
However there are some cases of vertigo that can be dangerous to some people especially if the vertigo is related to brain issues.
If the vertigo is caused by inner ear problems then it usually is not dangerous.
But if the vertigo is caused by brain problems then it can be dangerous and cause things such as double vision, slurred speech, weakness or numbness of the face, clumsiness, and falls.
If you do have those issues when the vertigo or it seems to get worse then see a doctor about it or go to urgent care of it gets serious enough go to the emergency room.