A new paper has been published by Dr. Alyssa Dweck on the topic of sleeping in your underwear and it highlights a number of health risks.
Firstly, and perhaps most obviously, wearing undies to bed doesn't allow your crotch area to breathe meaning that sweat and bacteria can easily build up — especially in the warmer summer evenings and for menopausal women suffering from hot flushes during the night.
This can lead to infection, irritation and, for men, it can even affect their fertility. This is because wearing boxers to bed heats up the testicles to a temperature that could potentially compromise their sperm quality.
If you really dislike the idea of sleeping commando then opt for your biggest, most breathable pants.
(Redbook)