Blood on Underwear Before Offering Prayer 

“And purify your garments” (Al-Muddaththir 74:4)

Question: 

I have internal bleeding, i.e., blood comes out with the feces and sometimes it comes out spontaneously on my underwear. I may spend more than 12 hours at work. Can I pray when there is this blood on my underwear or not? Please note that I am at work and cannot change my underwear.

Answer: 

What everyone who wants to pray must do is to purify his clothes of any impurity that is on them, because Allah says: 

“And purify your garments” (Al-Muddaththir 74:4) 

And when the Prophet (peace be upon him) was asked about praying in a garment in which a woman had menstruated, he ordered that it be cleansed of impurity before praying in it. (Agreed Upon) 

So you have to purify your garment or change it before praying. You can ward off hardship by putting a pad or piece of cloth to stop the blood spreading, then when you do wudu’ (ablution) you can change this pad or cloth and wash the part of your body that the blood has gotten on to. If that is also too hard for you, then there is nothing wrong with your praying in this garment. 

Sheikh Ibn Baz (may Allah have mercy on him) said: “The sick person who is affected with urinary incontinence and does not recover with treatment can do ablution for each prayer after the time for it has begun, and wash off whatever has gotten onto his body, and set aside clean clothes for praying if that is not too difficult for him, otherwise he is forgiven, because Allah says: 

“and [Allah] has not laid upon you in religion any hardship” (Al-Hajj 22:78) 

“Allah intends for you ease, and He does not want to make things difficult for you” (Al-Baqarah 2:185] 

And the Prophet (peace be upon him) said: “”If I command you to do a thing, then do as much of it as you can.”  

But he should take precautions to prevent the urine spreading on his clothes or body or the place where he is praying. 

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Source: Islamqa.info