I used to watch the X-Files when I was a little kid but I can only actually recall two scenes from the show. One is from an episode where they find an area that causes everything inside it to age more rapidly and the other, more disturbing scene, showed cockroaches crawling under a person’s skin. Thanks to a simple internet search, I now know that that episode was War of the Coprophages, although nothing in the summary triggered any other recollections.
One unfortunate holidaymaker in Bali had a similar, real-life experience. He woke up one morning to find a red trail along his belly. It didn’t respond to creams and continued to lengthen. After the weekend, he went to see a dermatologist who examined the trail and extracted a small spider which had burrowed under his skin through his appendectomy scar!
Keeping with that theme, in India, a man went to the doctor because of a strange itch in his ear. The doctor looked inside and found something strange. Upon extraction it turned out to be a cricket that had crawled into the man’s ear. It was still alive and a lot larger than one would expect. I’ve embedded the video below and there are more details in the video description and earlier link.