Wudhu shall break if you feel leucorrhoea. Also the fluid which comes in leucorrhoea is impure, it will make the area smeared by it as impure. This is a common ruling. However, if you are in a journey and the fluid is nominal i.e. less than one dirham and you have difficulty in washing it then you can offer salah without washing it only by making wudhu. If you do not feel any difficulty in washing it then you should offer salah after washing it so that your salah is offered in complete purity.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband