If you think your hairline is receding every time you look in the mirror, you’re not alone. More than half of men 50 or older have signs of hair loss. It reaches 4 out of 5 men by age 70.
Why? It's usually something you can blame on your family tree, but there are several other possible reasons.
Male pattern baldness -- you may hear it called androgenetic alopecia -- is triggered by the genes you got from your parents. Exactly how it is inherited isn't clear, but it does tend to run in families. So if you have close relatives who are balding, you're more likely to have it, too.
Doctors don’t fully understand why certain hormonal changes cause hair follicles to shrink, or why the balding process gradually happens in the same pattern for most men. But it usually starts with a thinning of the hairline above your temples and crown.
Hair loss could be a side effect of certain drugs you take for:
Stress or Shock
Things like ringworm can create scaly patches on the scalp and bald spots. The hair usually grows back after treatment.
Your Immune System
If you have sudden hair loss that leaves round bald spots about the size of a quarter in various places on your head, you may have a genetic condition called alopecia areata. It often begins in childhood. You’re more likely to have it if a close family member has it.
Your body’s own immune system attacks your hair follicles, causing small patches of hair to fall out. There’s no pain or sickness involved, and it’s not contagious. Your hair may grow back, but it may fall out again, too.
Impulse Control Disorder
Some people have an urge to pull out their own hair -- from the scalp, eyebrows, or someplace else -- a chronic condition known as trichotillomania. It could affect 1-2% of adults and teenagers.
Wearing a ponytail, braids, or cornrows where the hair next to the scalp is pulled tightly can cause temporary hair loss called traction alopecia. In addition, hot oil treatments and perms may damage your hair follicles.
There are a number of old wives’ tales about hair loss, most of which are false. For example:
- Wearing a baseball cap or hat may give you “hat hair,” but it does not lead to hair loss.
- Neither does swimming in a chlorinated pool or salt water.
- Sunscreen won’t make your hair fall out, but it will protect the areas where your hairline has receded.
- Hair dryers may cause your hair to be more brittle, but they won’t lead to permanent hair loss.