The human body is covered with tiny sweat glands—even on our fingertips. When we touch things we leave slightly moist fingerprints, though we often don't think of our fingers as particularly sweaty areas. Prepare for a gross-out.
In this ultra-closeup video, we see a human finger, replete with sweat glands along the tiny ridges of the fingerprint. In timelapse, we see sweat burst to the surface. Behold:
Pertinent fact: The fear of excessive sweating is called hypothermosis.