diarrhea
Siempre que salgo al extranjero, sufro de jet lag y diarrea.
Whenever I go abroad, I suffer from jet lag and diarrhea.
She's had diarrhea for a while now.
— La Tumba de las Luciérnagas (1988)
Necesito medicina para la diarrea.
I need medicine for diarrhea.
I have some diarrhea.