A little urine comes out of him after he does wudoo’; is he excused for that?
Question

                Is a little urinary incontinence forgiven? Because sometimes when I take off my clothes I find that a little urine has come out without me realising it. 

Do I have to change my underwear for every prayer? May Allaah reward you with good.
Praise be to Allah.
    If you are certain that some urine has come out, then you 
    have to repeat your wudoo’ and wash off what has got onto your clothes. If 
    the site of the urine is not clear to you, then you should wash the parts 
    where you think it most likely got onto, so that you can be certain that the 
    impurity has been removed. 

    It says in Zaad al-Mustaqni’: If the location of the 
    impurity is not clear, it should be washed until one is certain that it has 
    been removed. 

    Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said in
    al-Sharh: meaning if the impurity got onto something, and its 
    location is unclear, then it is essential to wash whatever it got onto so as 
    to be certain that it has been removed. It should be noted that the area the 
    impurity gets onto will be one of two things: either it will be small or it 
    will be big. If it is big, then he should do his best to wash whatever he 
    thinks most likely the impurity got onto, because washing all of the large 
    area is difficult. And if it is small, then he has to wash it so that he can 
    be certain that it has been removed. End quote from al-Sharh al-Mumti’ 
    (1/435). 

    Thus you will know that a small amount of urine is not 
    excused. 

    You should beware of waswasah, because it is a disease and an 
    evil; if it gains power over a person it will cause him distress, instil 
    doubt in him and make worship difficult for him. So beware of that. 

    Hence we say: Do not inspect your clothes and do not worry 
    about this matter until it leaves you. 

    Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) was 
    asked: When I finish my wudoo’ and go to pray, I feel that a drop of urine 
    has come out on my private parts. What do I have to do? 

    He replied: What he should do is ignore this, as enjoined by 
    the imams of the Muslims, and not pay any attention to it or look at his 
    private parts to see whether anything has come out or not. If he seeks 
    refuge with Allaah from the accursed shaytaan and ignores it, it will 
    disappear. But if he is certain, absolutely certain, then it is essential to 
    wash off whatever urine has got on him and repeat his wudoo’, because some 
    people, if they feel some coolness on the head of the penis, think that 
    something has come out. But if you are certain, then it is as I have said to 
    you. What you are saying is not incontinence, because it stops and starts, 
    whereas incontinence is continual. But this (your case) means that one or 
    two drops come out when you move. This is not incontinence, because once a 
    couple of drops have come out, it stops. In this case you should wash it and 
    do wudoo’ again, and do this all the time. Be patient and seek reward with 
    Allaah. End quote from Liqa’ al-Baab al-Maftooh (15/184). 

    As for urinary incontinence, that means that it comes out 
    without stopping at any particular time. The one who has this problem has to 
    wash his private part and wrap it so as to prevent the urine from getting 
    onto his body or clothes, and do wudoo’ after the time for prayer has 
    begun. 

    Please see also the answer to question number
    39494 for information on the 
    rulings on urinary incontinence. 

    And Allaah knows best.