What do Persians believe causes illness?

Persians traditionally believe that illness can be caused by a combination of physical, spiritual, and environmental factors. In Persian medicine, the balance of the four bodily humors—blood, phlegm, yellow bile, and black bile—is considered crucial for health, and an imbalance can lead to illness. Additionally, spiritual influences, such as the evil eye or negative energies, are thought to contribute to health issues. Therefore, treatments often involve a holistic approach, addressing both the body and spirit.