Well that is the question to be answered yet, non of us can get doctors to help us so we just guess which parasite is causing what and is where in our bodies. I have parasites crawling around under my scalp, in my cheeks, gums, neck, ears, nose, and eyes. Some of mine are thin like the threadworm, but I don't know if they are the threadworm for sure, others in my ears are pinworms, I know this for sure. I get the thread like worms out of my eyes.
All I can tell you is the 3 main herbs, blackwalnut, Wormwood , and cloves works well on all of these.
Also I put oil of oregano or tea tree on a wet Q-tip at night and put some in my ears and nose. I have these in a squirt bottle too, and if I know I will have time to shower the next morning I squirt my scalp at night with these. These are both strong smelling so you will need to shower. If I am going to be home on the week ends I stink like one of these all week end,my family says it helps to clear their sinuses out!!! I have been fighting these for a long time, but I have gotten rid of some also, my face and scalp are not as full with them as I use to be....good luck, hope this can help you...heyjude