you should not use your shower as a place where you can urinate. That’s wrong….If there's a shower, there should be a rest room next to it and you should use there for urinating...

well concerning urinating while showering,well whether or not if it's hygienic depends on whether or not you piss everywhere around the walls and in corners which might not be washed away immediately and that could cause a very unpleasant smell…

Well if you are the only person using the shower then that could make you not to worry about that as long as your urine is going right into the drain and is being washed away while you were showering.

but if you have other people living with you or you are in a public restroom or hotel while using the shower then make sure you do not urinate in the shower because such action could irritate someone else especially if the person is a type that has strong sense of smell and could easily perceive the smell of your urine…

so the bottom line is that if you are the only one using the shower or you live alone then you can urinate in the shower as long as you frequently wash the bathroom but if it is somewhere else then it is advicable that you should not urinate inside the shower….be considerate