What do chigger bites look like?

[Bird]

Never had any of them ooze. I know where I possibly picked them up and that day I did use OFF but I guess a few still got me. Thing is I didn't start itching until a day or two after. Can you use nail polish at any stage of the bite or is it best soon after?

I'd say you can use the nail polish anytime. Naturally, the sooner, the better because you don't suffer so long from the itching.