YOU SAID:

Without water, he developed a massive headache and could feel his eyes pushing out of his skull.

INTO JAPANESE

水を飲まないとひどい頭痛が起こり、目が頭蓋骨から飛び出すのを感じた。

BACK INTO ENGLISH

If I didn't drink water, I would get a really bad headache and I would feel like my eyes were going to pop out of my skull.

INTO JAPANESE

水を飲まないとひどい頭痛がして、目が頭蓋骨から飛び出そうな気分になってしまいます。

BACK INTO ENGLISH

If I don't drink water, I get a really bad headache and it feels like my eyes are going to pop out of my skull.

INTO JAPANESE

水を飲まないとひどい頭痛がして、目が頭蓋骨から飛び出そうな気分になります。

BACK INTO ENGLISH

If I don't drink water, I get a really bad headache and it feels like my eyes are going to pop out of my skull.