What kind of disease does the narrator of “Zaabalawi” suffer from?

Sources:(To be decided by writer. It is a must to cite all sources you use unless otherwise specified in the instructions)
Subject: World literature
Topic: Naguib Mahfouz, “Zaabalawi”

Paper details:

What kind of disease does the narrator of “Zaabalawi” suffer from? Can you detect a pattern in his series of interactions?