Pus or Blood in a Scratch
Scholars have said that seeing pus, blood, or discharge in a scratch in a dream may indicate that the scratcher speaks ill of the scratched person. However, the scratched person may subsequently acquire wealth.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.