Malicious people make deals with goblins to harm those they envy; in the most innocent cases, they will only play pranks like hiding things, but if they encounter evil goblins, be very careful, as the rumor mill says they can even cause death.

In rural hospitals, it is very common to find little girls with long hair who claim to be attacked by their little goblin friends. They often have small bites on their arms and legs that later get infected because they don't know how to treat them. How do you prescribe medication for the bite of a non-existent being, right? 

Many women called witches work with goblins; they say they like sweets, tobacco, and aguardiente and recommend, as a last resort, leaving these things as an offering in exchange for them to leave.