Research shows hypersomnia could be made worse by overripe foods, smoked meat and aged cheeses. Is it time to ditch the gouda for good?

Name: Excessive daytime sleepiness.

Age: First described in 1976.

Appearance: You, asleep in the clothes you went to work in.

Surely it’s natural to feel a bit sleepy during the day? Yes, but that isn’t what this is. The important part of the equation is the “excessive”. If you’re always falling asleep outside bedtime hours, that’s a problem.