Assalam alaikum warahmatullahe wabarkatohu
dear brothers and sisters , One of the truth is that Islam is not only a religion but it is complete deen menaing code of life ,
As our God is our creator therefore he give us complete instructions for our life through his Prophet Muhammad ﷺ how we can do so that we can enjoy maximum advantage of our life both in this world and in the hereafter
The Prohibition Of Urinating While Standing
“Whoever narrated to you that the Prophet would urinate while standing; then do not believe him. He would not urinate except while squatting.
Grade: Hasan Reference : Jami` at-Tirmidhi 12
What Has Been Related About The Permission For That
“Allah’s Messenger came to a waste area used by people, so he urinated on it while standing. I brought him the (water for) Wudu. Then I left to be away from him, but he called me until I was behind him. So he performed Wudu and wiped (Masaba) over his Khuff.”
Reference : Jami` at-Tirmidhi 13
In general a man should urinating by sitting , although if there is any situation he can also do by standing there is no harm in it provided the drop of urine should not touch body after rebound from the ground.
Salman reported that it was said to him:
Your Apostle (ﷺ) teaches you about everything, even about excrement. He replied: Yes, he has forbidden us to face the Qibla at the time of excretion or urination, or cleansing with right hand or with less than three pebbles, or with dung or bone.
Sahih Muslim Book 2, Hadith 73
From the above Hadees we came to know that Prophet Muhammadﷺ has forbidden us to face the Qibla at the time of excretion or urination, or cleansing with right hand or with less than three pebbles, or with dung or bone.