Life Frogs will give you warts. Toads are also considered one of the five poisons of yin.
Frogs are a symbol of good luck in Japan.
Some say you can tell what kind of year you'll have by the first frog found in spring. If it's sitting on dry land you will shed as many tears as it takes for the frog to swim away. If it jumps in the water you'll have misfortune all year. If it jumps in your direction you'll have many friends but if it jumps away from you you'll lose some of your friends. You cannot get warts from a frog.