From GameWatcher: “Being a realistic survival simulator in the heart of the rainforest, there are a lot of things that can kill you in Green Hell – or at least make you suffer so much that you want to die. One of the worst and just generally most annoying is a worm parasite, which you’ll need a Green Hell Bone Needle to dig out.
But where do you get these Bone Needles from? Can they be picked up from anywhere, or do you need to craft them? If they have to be crafted – how do you do that? Is there anything else you need to do to get rid of worms, other than a Holy Hand Grenade or Banana Bomb? Let’s dig out some parasites!”
Source: N4G PC Green Hell Bone Needle – How to craft and remove a worm parasite