why is blender crashing?

Hi, 

every time I am trying to style a strand of hair in particle edit mode my blender 2.9 crashes, I know it is not my laptop, because it is never crashed when I was modelling in edit mode. Why is the software crashing every time I am in particle edit mode and styling hair. And how can I stop it from happening? 


Thank you very much for taking the time to read this and answer it.