Parasitic worms could be hiding in you—how to spot the unusual signs

The comedian Shappi Khorsandi once commented that she used the mythical concept of “sugar worms” to get her children to brush their teeth after sweets. It’s a trick I poached to convince my daughter to do the same. She’s since grown wise to this, but now luckily manages to navigate her way around a toothbrush twice a day without resistance.