Hypothermia

Hypothermia is a medical condition where the core body temperature of a body drops below the required temperature needed for normal body functions.

Cervantes Quinn used a medical tricorder in 2268 on himself and discovered that he was suffering from hypothermia and hypoxia. He was able to cure the hypothermia with some tri-ox compound. 

In the year 2273 when the Federation shuttlecraft Halley was damaged within the Hohweyn system, Doctor Leonard McCoy was trying to prevent Pavel Chekov from getting hypothermia. 

In 2367 when the shuttlecraft Venture was disabled on the far side of the Bajoran wormhole, Jake Sisko wondered when hypothermia would be setting in. 

In 2368 Jean-Luc Picard and Geordi La Forge had to work quickly to prevent the Legarans from succumbing to hypothermia after a Romulan agent had sabotaged their environmental systems. (TNG short story: "Last Words")