The evil eye is a belief that somebody can voluntarily or involuntarily bring disease and disgrace to another person by looking at them, usually brought on by envy. In some cultures, the belief is focused on children, where someone can inadvertently give a child the evil eye by complimenting them, as it draws in negative energy. The negative energy of an envious person can cause physical symptoms that are not related to a disease, such as weakness, eye infections, upset stomach, fever and nausea. Also, it is likely that the affected person will have personal, family or professional problems without any apparent cause.