Exorcism in Islam is called ruqya, and is thought to repair damage believed caused by sihr, witchcraft or evil eye. Exorcisms today are part of a wider body of contemporary Islamic alternative medicine called al-Tibb al-Nabawi (Medicine of the Prophet).
Islam has the concept of a malevolent Devil. Belief in Jinns, or supernatural beings, is also widespread in the Islamic world.
While Satan (named Iblis) is said to be a tempter, whispering to the human hearts inciting evil suggestions, Jinn are often held in folklore to be able to enter a humans body physically or haunting them in their mind. A possession by a Jinn can be caused for various reasons. Ibn Taymiyyah explained a Jinn could sometimes haunt a person, because the person could (even unintentionally) harmed the jinn, for example by urinating, throwing hot water on him or even killed a related jinn without even realizing it. In this case the jinn will try to take revenge on the person. Another cause for jinn possession is when a jinn fells in love with the human and thereupon the jinni possesses the human. Some women tell to experienced a jinn possession, there the jinn tried to have sexual interaction from inside of her body. A third reason is said, when a jinni is evil and simply wants to harm a human for no specific reason, he will possess a human, if he gets the opportunity, while the human is in a state of strong emotions or unconsciousness.
In islamic belief, there are different signs of possession for example:
In case of a "complete control" by the Jinn, the possessed surrendered to the Jinn and his consciousness is subverted by him (or her). Such a jinn is indeed absolutely evil and thereupon the acts of the person are going to be evil as well. The person will surrender to the commands of the jinn anytime. In a "constant possession" the person will not even act without a command by the jinn.
According to reports of people who claim to be possessed, they assert, during the jinn possession their spiritual abilities, like the sixth sense, were increased, but it can also cause physical damage, such as inexplicable bruises or marks appearing.
In a typical Islamic exorcism the treated person lies down while a white-gloved therapist places a hand on their head while reciting verses from the Quran.
Specific verses from the Quran are recited, which glorify God (e.g. The Throne Verse (Arabic: آية الكرسي Ayatul Kursi) and invoke his help. In some cases the adhan/"ah-zan" (the call for daily prayers) is also read, believed to have the effect of repelling non-angelic unseen beings or the jinn.