How can I tell if my cat has fleas?

She's been scratching herself more than usual lately. I tried using a flea comb on her, but nothing came up. However, her fur is black, so I could have missed something.

Thanks in advance.

Inspect your cat's favorite resting place. If you see little black specks, kinda the size of a period "." then squish one of those specks on a piece of paper. If you see red, it's blood and your cat has fleas.

Btw, the specs are really flea poop

Yep...what MiLu said... (YUCK, I know)

If her favorite resting spots are dark in color, you could also try sitting her on some white paper or a white sheet and combing down her back onto the it. If you see specs, do what MiLu said. If you're still not sure, it doesn't hurt to get some topical flea treatment from your vet. (Please do not get cheap over the counter stuff from stores).

I would say just try running a flea comb threw the cat, this assumes the cat will tolerate it . Also cats with fleas tend to chew and lick themselves frequently as well.