Take leaf and pic to your local nursery for complete answers.
What s your plant? Houseplant? Or outdoor?
Hi Tanya: Could be a couple of things, over/under watering, old age, just that time of year, etc. Check these sites out, they may help:
It is probably in shock.
Look up the plant name on the internet, it should give care tips
I know how to care for it something is either eating the leaves or fungus maybe got it figured out thanks tho👍