Warm feet also dilate blood vessels, improving circulation and reducing nighttime leg cramps. For those with cold feet or Raynaud’s syndrome, socks can be a simple, drug-free way to get a better night’s sleep.
The less obvious risks
, however, include the potential downsides. Wearing tight or synthetic socks all night can trap moisture and heat, creating an ideal breeding ground for fungal infections like athlete’s foot.
Dermatologists warn that poor airflow can lead to skin irritation, dryness, and even bacterial growth.

For people with diabetes or poor circulation, tight socks can restrict blood flow and increase the risk of foot ulcers—a serious complication. Overheated feet can also disrupt your body’s natural temperature drop during sleep, sabotaging deep REM sleep cycles and leaving you feeling tired the next day.