Type 2 diabetes
symptoms don’t often make people feel unwell, which means many may not realise they have it.
The condition is where the body doesn’t react to insulin properly and is often caused by a person being overweight or obese.
But if type 2 diabetes is left untreated, serious complications can occur, including kidney problems and nerve damage.
One indicator of the condition is long naps, according to a scientific review.
In findings presented in 2016 at the European Association for the Study of Disease annual meeting, it was revealed people who took daytime naps longer than an hour were 45 per cent more likely to have type 2 diabetes compared to those who napped less or not at all.