Hi,
I'm writing on behalf of my dad. He is 61. We live in Poland. He suffers from severe headaches since literally decades. The symptoms are quite strange. The pain is caused directly by low temperature. No painkillers work for pain. The only way to get rid of the pain is to heat the head. During sleep cold sensivity highly increases. He sleeps under half-meter layer of blankets and sponges above his head. During the winter no caps can protect him from cold. He can't go outside. His sinus are fine. Computed tomography scan didn't detect anything. No doctor could helped him so I'm looking for help in the internet. Thanks
His bed: https://imgur.com/a/RKLbn