Ruqyah is the recitation of quranic ayat and supplications (Duas) reported from the Messenger of Allah he would recite over the sick as a means of protection and cure. It is a very effective means of healing from the effects of magic and jinns as well as treating illness.
There are many different methods of ruqyah but the important thing is that it should be done by a pious, well-educated and qualified Raaqi who knows and understands the science behind it. Performing ruqyah without knowledge or understanding will cause more harm than good.
It is also important to understand that it is not the raaqi who heals but it is Almighty Allah who does, He may manifest His healing in different ways for each person. He may cure a person with the sunnah morning and evening adhkar or through other ruqyah techniques. It is up to the patient to be patient and trust in Allah.
A patient who is suffering from the effects of jinns and magic should know their symptoms such as being unable to sleep at night, feeling like someone is with them in the room or seeing fast moving black shadows out of the corner of your eye. You should seek the help of a raaqi as soon as possible to be cured before the problem gets worse. Also it is very important to recite the quranic ayats mentioned above in their full context and with absolute concentration and conviction. quran ruqyah