Hello, i'm 22 years old male. In early feb 2015 i went outside just after taking a bath, my hair was wet and temperature outside was probably bellow 5 degrees Celsius. Actually i dried my hair but my back head remained relatively wet. After that day, every time my head is wet and it's a bit colder outside, i feel pain (at that exact area of head back) and i feel tired. For example in jun i was back from swimming pool and i went in air-conditioned house in which air was about 10 degrees Celsius cooler than outside. Immediately i felt like i had a hammer hanged on the back of my head, i felt tired, even felt sleepy. So what's my diagnosis? Is this a common thing and can i do something about this?
Thanks in advice,
MakingPlays