YOU SAID:
Stomach pain is the bane of my existence.
INTO JAPANESE
胃の痛みは私の存在の妨れです。
BACK INTO ENGLISH
Stomach pain is an obstacle to my existence.
INTO JAPANESE
胃の痛みは私の存在の障害です。
BACK INTO ENGLISH
Stomach pain is an obstacle to my existence.
That didn't even make that much sense in English.