It feels like there's cold water dripping down on my left knee but it's dry. why do i have this sensation?

Meralgia Peristhetic: The scary problem is only annoying. A nerve that exits your pelvis just under the bony point in the front is the culprit. It is irritated, often by tight clothing, and along with the wetness you may feel numbness on the outer side of the thigh with a cold feeling. Because it is numb people often burn themselves trying to warm it up. The nerve is the anterior femoral cutaneous. Nothing helps!