I have this and know what it is!! It's when you catch a cold draft on your head! My mom had it and so do I. I can get this from air conditioning blowing on me or just the car window draft hitting my head or sweating on my scalp in winter. Usually 1/2 an ibuprofen will calm it down until it's over in a couple of days. I have also helped make it feel better by using a warm hairdryer on it when it's really flaring up. I'm so glad I found this forum because I had no idea others were getting this too! Hope this helps!!