Blood on the Shirt
Scholars have said that seeing blood on one's shirt without knowing its source might indicate that the dreamer will be falsely accused and lied about unknowingly. This interpretation is derived from the story of Prophet Joseph (peace be upon him) and what he endured.
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.