I'm not exactly sure but the victim says that someone is inside him, controlling his movements and thought patern. Also few times when taking walk, some kind force was pushing body to the ground, especially when walking through a unveven pavement, holes, almost lost consciousness few times. There also was a phase of pain in sole of the foot, needle kind of pain, when victim tried to stand up and walk it was too painful to lift a foot from the ground because of the pain and the feeling like foot is stuck to the ground so the only way he could move was drag his foot through the ground until the pain faded out for him to walk. That phase was going on for a month or two. Lots of all kinds of headaches.
Also hand, legs, whole body would move like they had their own consciousness along with a phase where the hand would write and try to communicate on the wall, ground etc. But it would start writing not full sentence or start writing without finishing the sentence and allow victim to guess it in his mind, then finish writing with a hand. After that type of writing stopped, after some time followed random headaches and cofusing thoughts, dizziness, significant loss in energy.
I could add more with more detailed info on this.
Maybe some of those things I mentioned sound familiar to you.
Appreciate any kind of advice.
Best thing to do is to first go see a doctor. See if any or all of this is related to a medical condition he just picked up. The doctor should be able to tell you if it is something physically effecting him or not (and also causing him to feel paranoid).
If the doctor can't come up with anything, I would go see a professional about it, someone who works with invocation, evocation, and banishing a lot. Physically go see this person with the victim, introduce them, and have the victim describe their symptoms. This professional should be able to handle it, or otherwise point you in the direction of someone who can. If you don't have a nearby local occult community to find your professional in, I would go see a Catholic priest and see what they can do for you. There are still a few of the Catholic priests who know how to perform exorcisms, and while you may not find one in your area, if your case is proven they may send someone to help.
I wouldn't take advice from people online whose reputations, knowledge, experience, and abilities you do not know. I wouldn't find similar cases and try to do what that person did to fix it. Each spirit is different from the other; fighting one might make it back off, while fighting another will simply make it more violent against you. Cases of real, uncontrolled possession should be taken care of by people who know about it, not by teenagers who think magic is cool.
As Sin said, the very first thing they need to do is being evaluated by a physician to make certain there is not something medically wrong that needs to be treated. Before one jumps at a magical reason for symptons it is always wise to rule out the mundane.
