It’s better to get her examined , her vital signs need to be checked .
It could be a positional vertigo , which can easily be treated by medication . But other causes should be ruled out and proper history need to be noted to give you conclusive picture
Next Steps
Get a physical medical consultation
Health Tips
Doesnt seem to be anything related to oncology .If you are not in a position to get a physical consultation , get back to us with a detailed history and and vital signs values