Sleeping with wet hair give you chronic headaches?

I have been to China recently. They have the belief that going to bed with wet hair will cause a headache. However they say this is more common in the elderly. I myself am over 50 and have not had this happen to me yet. I believe it is just a wives tale also. Maybe there was something else involved as to what they ate or didn't eat and possibly something in the air. The air there is not the best in many cities in China, I have been to several.