What is Jinn possession? How can a person know that he is possessed by Jinn?

All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

We previously dealt with Jinn possession, its reality, and how to guard against it. For details, refer to Fataawa 88660 and 6281.

As for your question, Jinn possession has many symptoms. These include:

1.     Continuous epileptic convulsion, especially when hearing the Quran;

2.     Continuous nightmares;

3.     Loving something that a person used to hate or vice versa;

4.     Tremendous annoyance when reciting or hearing the Quran.

There are many other signs that you will find in books on this topic.

Allaah Knows best.