To explain the point, first let us take a brief look at the causes of hair fall. The primary reasons of hair fall include,
Stress: Increased stressed and hectic lifestyle coupled with junk eating and lack of exercise work as a primary cause of hair loss and hair thinning over time.
Dandruff and other scalp infections
Dandruff and other types of fungal and bacterial scalp infections make a primary cause of hair fall in both men and women.
As we all know when it comes to hair thinning and baldness due to uncontrolled hair loss, heredity is something to be blamed. However, in case of women heredity is not usually a cause of baldness.
Lack of care
It is important to take proper care for the hairs otherwise they can fall off even without any major reason. Cleaning and conditioning hairs regularly is important to keep the scalp healthy and to stop hair fall due to breakage.
Certain diseases and medications
Certain diseases and hormonal medications can cause heavy hair loss, which is commonly known as toxic alopecia. However, normally this kind of hair loss and baldness is recovered after the condition has been cured, or the medication has been stopped.
How helmet is related to these causes of hair loss and baldness
There is nothing wrong with a helmet that can cause you hair loss, but helmet might create a condition that can exaggerate some of the above problems, boosting the hair loss. Due to wearing of helmet the air is blocked out from your scalp, which increases the scalp perspiration. This sweat accumulates on the hairs and on the pores of the scalp weakening the hair roots which triggers hair fall. Apart from this, accumulation of sweat on the scalp makes it ideal for fungal and bacterial infections to grow, which is a major cause of hair fall. Continuous sweating of the scalp can also worsen dandruff, if you already happen to have the problem, causing extreme hair fall.
In addition to that, if you are someone who does not take the right care for cleaning and conditioning your hairs regularly, you are expected to experience more hair fall due to wearing a helmet because in this case the need of cleaning your hairs regularly is more prominent.
So, as you see, if you already have some scalp problems, wearing helmet can aggravate them causing more hail loss; but if you have a healthy scalp that is cleaned and maintained regularly, helmet will not cause any added hair loss. So, now you know why some people experience hair loss due to wearing helmet, whereas, some feel no difference.
There is another type of hair loss and balding that might be caused due to wearing a helmet; it is medically known as traction alopecia. However, this can be caused, not only due to wearing helmets, but also due to donning any hairstyle that pulls the hair roots back with a high force.
When the helmet is worn over years in a fashion which causes high stress on the roots of the hairs at the front hair line, the hair line slowly recedes with time, causing permanent baldness. In this case, the hairs are pulled back with such high tension over an extended period of time that the hair roots are slowly detached from the blood supplying veins, causing the hairs to fall off.
The simple cure
The problem of traction alopecia can be very easily mitigated by ensuring that when you put on the helmet, it does not pull the hairs back. Continue jiggling and adjusting your helmet on your head till you feel, that none of the hairs are being pulled hard. Taking this easy measure can ensure that you do not suffer from traction alopecia due to wearing helmet.
To ensure that wearing a helmet does not exaggerate the conditions that can lead to hair fall keep your hairs clean by washing them regularly with a mild cleanser. Let the sweat dry off by taking your helmet off while taking breaks in between riding. Ensure that you are not already suffering from dandruff or other scalp infections. Using a cotton handkerchief or scarf to cover the hairs before putting on the helmet can also be very helpful and effective to absorb the sweat and to reduce the chances of exaggerating any existing hair problem.