Chris Brown will stink to holy hell ... because he's only allowed one shower every two days.
According to our sources, Brown -- who will sit in jail until April 23 -- is in solitary confinement 23 hours a day ... which means he won't have a cellmate to disgust with his vile odor.
No matter your opinion on Chris, this is kinda harsh. I'd go crazy if I had to sit in a room all day everyday for a month or longer. Hell, I doubt I could handle a few days with how claustrophobic.