Doctor Becoming a Tanner
Interpreters have mentioned that whoever sees a doctor become a tanner of hides may indicate his skill and the large number of people who recover through his hands. However, if his tanning is seen as spoiled and rotten, it might suggest that he is ignorant and deceitful in his work.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam