Clothing items you should never wear when sleeping:

1. Underwear

Tight underwear can be a possible culprit for poor sleep. Not only is it uncomfortable but it can lead to a series of health issues: for instance, it can cause yeast infections in women and lower sperm production in men.

As explained by Healthline, “candida, the bacteria responsible for yeast infections, thrives in warm, moist environments.” In the case of men, “warm, wet genitals are a breeding ground for fungi like tinea cruris, or jock itch.”

Recommendation: 100% cotton underwear.

Like your undies, your bra can also cause trouble. When too tight, bras can cause irritations and hyperpigmentation, warns Jen Wan, co-founder of skincare company Soteri Skin.