发痒

I've got a slight tickle in my throat and it's making me cough.

I suffer/have/feel an itch in the feet. / My feet tickle/are tickling.

Mosquito bites are still itching.

Pepper itches if it gets into the nose. / Your nose itches if pepper gets into it. / Pepper causes your nose to itch.

itch all over

one's nose itches