Answered by Shaykh Faraz Rabbani
If blood spreads on one’s skin half way through wudu, should one start his wudu over again or should he merely wipe off the blood and continue on from the halfway point?
Walaikum assalam,
You would have to start your wudu over again, after wiping and washing away the blood. It is from the conditions for the validity of wudu that nothing that negates it occur during it. [Radd al-Muhtar]
Walaikum assalam,
Faraz Rabbani.