YOU SAID:

It hurts to put my pants on.

INTO JAPANESE

ズボンをはいても痛い。

BACK INTO ENGLISH

It hurts even if I put on my pants.

INTO JAPANESE

ズボンをかぶっても痛い。

BACK INTO ENGLISH

It hurts to wear pants.

INTO JAPANESE

ズボンを着るのは痛い。

BACK INTO ENGLISH

It hurts to wear pants.