Translation of "Crumbling" in French

Pompeii is crumbling.

Pompéi s'effondre.

My walls started to have a little crumbling where I saw water.

les murs s'effritaient, et je voyais de l'eau couler.

- I haven't slept well recently, so my skin is falling apart.
- Recently, I've been suffering from lack of sleep, so my skin is crumbling.

Comme j'ai mal dormi ces derniers temps, ma peau est devenue toute ridée.