For the last month or 2, I've had the sensation of cold water drips on my skin. It happens at least once most days. Usually it is somewhere on my leg--thigh, behind my knee, ankle area--and occasionally my back. There is no pain, just the sensation as if a very cold drop of water hit my skin. It doesn't last--it literally disappears in a second. Should I be worried? Should I see a doctor, and if so, what type of doctor? A little about me: I am 50 years old. I am overweight by about 50 lbs. but I am on a diet (since early June I've lost about 10 lbs.) I am a full time college student in an online program and I work online so I'm sitting a lot. I try to hop on the treadmill or walk outside for a total of 30-60 minutes per day.