LAS VEGAS — Three weeks ago, Joey Logano returned home from a haircut to a surprised reaction from his wife, Brittany.



What did they do to the back of your head?



Suddenly, Joey realized there were patchy spots on the back of his head where chunks of hair were missing. Though he initially shrugged it off as a haircut gone horribly wrong, he grew alarmed when the hair hadn’t started to regrow back two weeks later.



After seeing a doctor and undergoing tests, Logano learned the reason for his spotty hair loss: Alopecia Areata, a common autoimmune disease that attacks a person’s hair follicles.



Logano’s health is not at risk and he is fine physically, he said; it’s just that his hair is falling out in some areas. While not ideal — particularly for a race car driver who is in the public spotlight — Logano is keeping it in perspective.



“It could be way worse, but I just wanted to say something before...