helpp!! nute burn or no

View attachment 1693434nute burn . mag/cal def what?

im not a pro by any means but its kinda hard to tell. the pic is blurry on the point u need to focus on. is it just the 1 leaf or are there more? it doesnt look like it right off the bat but more info is needed.

Since it looks like it's only that one leaf, it's probably not nutrient burn.

"Usually" nutrient burn will affect more leaves and can be seen on the edges of each leaf.

It "may" be light burn from the light directly touching the leaf.
Possibly a chemical burn from you dropping something on the leaf? Did you spill any PH up/down, H2O2 or nutes on it?