The following old wives tales are very commonly believed, but are at times very illogical and almost always wrong. A good rule of thumb - if it didn't make you bald when you were 15, it's probably not making you bald now.

Stress? Probably not, unless you've undergone extreme physical or mental torture for months.

Bad Circulation? No. Male pattern baldness is not caused by a lack of circulation or nutrients to the follicle, whether it be by hats, ponytails, or anything else. There are conditions where trauma to the scalp has caused damage, but it wouldn't happen without you knowing it.

Sweat & Dirt? No. Beware of any treatment that claims it is "cleaning" the follicles of excess sebum, dirt, or sweat. Anyone who has ever had an ingrown hair can vouch for the fact that it takes a heck of a lot more than oil to stop a hair from growing through something. You sweat in high school, and you never lost a hair from it.

Hats? No. The high school baseball team was never known to be the baldest team in school. Hat's do not cause hair loss.