Answered by Ustadh Tabraze Azam
Question: As-salamu Alaikum.

When I was performing wudu today, on my damaged toe I saw some whitness on the side. When I wiped it, it didn’t move, and I assumed it was skin. However, when drying my foot I found it to be thick fluid. Would this be considered filthy since it spread beyond the point of exit?

Answer: Wa alaikum assalam wa rahmatullahi wa barakatuh,
I pray that you are in the best of health and faith, insha’Allah.
Yes, if it flowed out on its own or by an agent [= like your squeezing it out], then the ablution (wudu) would be nullified.
See: A Reader on Waswasa (Baseless Misgivings)
And Allah alone gives success.
Wassalam,
Tabraze Azam
Checked & Approved by Faraz Rabbani