Cassie has such bad body odour, even her family is shocked.
Meet the boy who feels like his blood boils when he is outside.
A teenager who suddenly loses control of his lower body.
A woman's mysterious attacks left her with a foreign accent.
The unsolved mystery of a young woman who vomits every day.
Three medical cases are examined, including 18-year-old Alicia, whose first term at university was marred by an uncontrollable quivering. Cameras also follow the story of 19-year-old Elizabeth, who sought help after developing a hump on her back. And despite making more than 300 medical visits, it took a newspaper headline for 57-year-old Dee to identify what had been making her feel disorientated for the past 12 years.
Cases include a four-year-old boy who is hardly growing, a mum barely able to breathe and a woman suffering from mysterious pains all over her body.
Documentary about three people with medical conditions which baffle doctors - a young woman who is allergic to almost everything, a teenage footballer who keeps falling asleep for days, and a 23-year-old student as weak as a frail 90-year-old.