noun
Refers to a blister or corn on the skin, typically from friction or pressure. Colloquial term.
新しい靴で歩いたら、かかとにまめができた。
I got a blister on my heel from walking in new shoes.
ギターを弾きすぎて指にまめができた。
I played guitar too much and got a blister on my finger.
The origin is uncertain. Possibly related to the word for 'bean' (豆) due to the small, round shape of a blister.