脚气（athlete's foot）是一种常见的皮肤感染，通常发生在脚底部。这种感染是由一种真菌（如霉菌）引起的，它可以通过接触感染的物品或地面传播。

下面是一些英文例句：

I have athlete's foot and it's really itchy.

The doctor told me to keep my feet dry and clean to avoid athlete's foot.

Is there a cure for athlete's foot?

I think I might have athlete's foot. My feet are red and itchy.