For many people, wearing socks to bed feels cozy and comforting—especially on cold nights. But what most don’t realize is that this common bedtime habit could be quietly affecting your skin health and hygiene.

Recent studies have revealed that socks can harbor surprising amounts of bacteria, sometimes even more than a toilet seat. The reason lies in what happens when warmth, sweat, and fabric stay in contact for hours at a time.

Why Socks Become a Bacteria Hotspot

Your feet naturally sweat throughout the day. When that moisture becomes trapped inside socks overnight, it creates a warm and damp environment—the perfect breeding ground for bacteria and fungi. Over time, this can lead to itchiness, odor, rashes, and even fungal infections such as athlete’s foot.

Socks also trap dead skin cells and dust particles, preventing the skin from breathing properly. Materials make a difference too: synthetic fibers hold moisture longer, while natural fabrics like cotton and wool allow better airflow and help your feet stay dry.