Scratch on the Forehead
Scholars have said that seeing a scratch on the forehead in a dream may indicate an imminent death. They also mentioned that any mark on the body containing pus or discharge is interpreted as wealth, and any non-harmful increase in the body signifies an increase in blessings. Furthermore, seeing diseases like leprosy and smallpox on oneself is considered better than seeing them on others, as seeing them on others may indicate sorrow and a decrease in prestige for the dreamer.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam