Picar perse is before the sting El mosquito te va a picar Itch is pica Me pica el brazo Picar also in my spanish is when you eat appetizers

Yes, picar means also bite (when a bug does it). The meanings of picar from the top of my head: -Sting -> Me picó un mosquito. -Itch -> Me pica el brazo (as in, it's itching). -Take the bait -> Ha picado un pez / Has picado (referring to a prank) -Annoy, provoke -> This is like... someone will get easily involved in a competition, soy you do that to them -> Me has picado, ahora quiero ganar. -Get annoyed -> Siempre se pica por tonterías. There's a lot of meanings, haha... The only thing you can do to tell them apart is context, I think. An arm won't sting anyone, right?

Tengo comezón. / Me da comezón. These mean to be itchy.

If we talk about verbs it could be both right. But usually we said in spanish itch, means the feeling. 'I feel itchy'' and sting it would be like i have a sting(bite) on my leg. It means too, the sting of the insect.