When Kino and his family lose their home, they go to Juan Tomas to see if he will hide them. Juan Tomas is worried about the escalating problems that the pearl has brought and thus is briefly indecisive about helping Kino and Juana.
The fact that the doctor refuses to help Coyotito because his parents are poor is an example of Man vs. Society. The doctor's ignorance to help them because of their social class is a societal issue.
Kino vs Juana - Juana sees the pearl as evil and a threat. She tries to sneak away with the pearl and throw it back into the ocean; however, Kino catches her and beats her to get the pearl back.