noun
boil; skin boil
Refers to a painful, pus-filled bump on the skin caused by bacterial infection. A common medical term.
お尻に根太ができて、座るのがつらい。
I got a boil on my buttock, and it hurts to sit.
根太がひどくなると、切開が必要になることもある。
If a boil gets worse, it may need to be lanced.