Fatwa ID: 04170
Answered by: Maulana Maruf Ahmed
Asalamu Alikum, after I urinate and finishing Wudu, I see some liquid (Urine, Madhiy or Wadiy) inside the opening of penis skin and it's not coming out and it, not a full drop it's just inside there with the skin, but I can see it clearly that there is some liquid there and it's not coming out. Does this break Wudu? Jazakum Allahu Khyrun.
In the name of Allah the Most Beneficent, the Most Merciful
If you are certain that no liquid has actually been discharged, then there is no need to repeat wudu.
If you simply feel like liquid is about to drop but hasn’t actually emitted, your wudu will remain intact.
However, if the liquid passes the ‘exit point’, then it will be considered as discharge and wudu will have to be repeated. 
Only Allah Knows best
Written by Maulana Maruf Ahmed
Checked and Approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham