Ear hair is a sign of increasing levels of testosterone and a result of the natural aging process.
Ear hair can also be a sign of potential genetic predisposition.
As men age and get older a mans levels of testosterone can influence the mans hair follicles in various areas of the body which include the nose, back and ears.
These hair follicles can become more sensitive to the levels of testosterone and lead to having thicker and longer hair growth in these areas of the body.
As we age, our hair growth patters can also change and some hair follicles can become more active and others become less active.
This is a natural process and part of the aging process which can lead to increased ear hair growth and most particularly in men although it can happen in women as well.
Genetics can also play a role in ear hair growth and hair growth in other areas.
Family history and your genetic predisposition can play a role in how much hair and where the hair grows on the body which includes the ears.
If you happen to have a family history of thick ear hair then it's much more likely for you to have the thick ear hair growth as well or even ear hair in general.
Although less common, some conditions like diabetes in mothers can lead to babies being born with hairy ears.
And even studies have suggested and found a potential correlation between ear hair growth and an increase risk of developing coronary artery disease, most particularly in men.
Ear hair is also a normal thing and also sometimes noticeable part of hormonal changes and aging.