What is the reality of jinn possession, how can a person know they are possessed, and how can one guard against it?

One can determine if a person is possessed through symptoms. If these symptoms are present, it indicates that the person is possessed. Among these symptoms are: continuous epileptic fits, especially when hearing the Quran, recurring nightmares, hating what they once loved and loving what they once hated, and experiencing extreme distress when reading or listening to the Quran.