Illness
Scholars have said that if one dreams of being ill, it may indicate corruption in one's religious practice, but they will not die in that year.
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.