As salamu alaykum I suffer from urinary incontinence and it is hard for me to change my underwear.As the amount of urine drops is very less,i ignore it and pray in it.While sleeping i got a wet dream which lead to wetness on underwear, trousers and may have wetted bed sheet also.I follow the opinion that semen is pure.But in this case the wetness contains both semen and the traces of urinary impurity already present on my underwear.So what is the ruling?Are the trousers and bed sheet pure or impure?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

According to the view of the majority of the scholars, it is obligatory on a person who is affected with urine incontinence to put a pad on the place (the private part), and he is not excused from that impurity. Rather, one should strive to restrain it so that it does not spread on the clothes and then one should perform ablution and pray after the time of the prayer has started. One may pray whatever obligatory and supererogatory prayers one wishes with this ablution. This view is safer in order to be acquitted from sin.

Nonetheless, the scholars of the Maaliki School are of the view that such impurity is pardoned if it is discharged involuntarily once or twice every day. Therefore, if someone wishes to act according to this view, then there is no harm on him. In our view, you should strive to avoid this impurity and wash your clothes, which are stained with it, by pouring water on it until it [water] encompasses the entire place of impurity.

If the Mani (sperm) gets in contact with the place that has become impure from urine, then it also becomes impure and one must wash the clothes from it.

However, we draw your attention that you should not rule that something has become impure unless you are absolutely certainty that it did, and whatever you are doubtful about, then, in principle, it is pure and not stained with impurity.

For more benefit, please refer to Fatwa 365380, 343018, 349147, 354916, 358042, and 361150.

Allah knows best.