Reducing friction Armpit hair prevents skin-to-skin contact during activities that involve arm motion, such as running and walking. The same applies to pubic hair.
The function of hair in our armpits is to protect the skin from friction and to help regulate body temperature.
The armpit hair acts as a wick to circulate off the sweat which otherwise would be susceptible to colonization of bacteria, fungi, and other microbes...as sweat would dampen the mostly/naturally enclosed area literally topping their req.
For most girls, armpit hair starts to grow a little while after they get pubic hair. So, if you have some pubic hair (even if it's scanty and soft) and you have your period, armpit hair may still be on its way. Then again, you may never have much armpit hair (and that's not a bad thing).
Usually it's important because less armpit hair will lessen the bacterial load that feed on sebum, sweat produced there, because less hair equals to less surface area for them to tether to & thus body odour is significantly reduced.
Friction, heat, and sweat during exercise or on particularly hot days can cause irritation of the delicate underarm skin. Avoiding shaving can also prevent razor burn, ingrown hairs, or folliculitis, which can all be consequences of shaving."
The importance of human underarm hair is unclear. It may naturally wick sweat or other moisture away from the skin, aiding ventilation. Colonization by odor-producing bacteria is thereby transferred away from the skin (see skin flora).
Premature pubarche, or the development of pubic hair before the age of 8 in girls or 9 in boys, is most commonly caused by premature adrenarche. Adrenarche is the maturation of the adrenal zona reticularis in both boys and girls, resulting in the development of pubic hair, axillary hair, and adult apocrine body odor.
According to anthropologist and professor Ashley Montagu in 1989, many East Asian people and African populations such as the San people are less hairy than Europeans and West Asian peoples. Montagu said that the hairless feature is a neotenous trait.
Scientists think human armpit hair — longer than that of any other apes — evolved to retain chemicals that are produced copiously by armpit glands, so as to intensify people's natural body odor and increase the chance that others will smell it, and like it.
Why do we have body hair, then? Well, it turns out that our hair follicles play an important role in homeostasis (aka, when our body systems are balanced and working properly), but also in wound healing and skin protection.
Pubic hair holds on to residual urine, vaginal discharge, blood and semen. Bacteria line up all along the hair shaft just lunching it up and creating odor. (Very appetizing, I know.) Trimming your pubic hair reduces that surface area for bacteria, thus reducing odor.
Plucking may be a quick and easy way to remove unwanted body hair, but it isn't always the safest or most effective. And plucking underarm hair is no exception. Plucking underarm hair can be painful, time-consuming, and if done incorrectly, can cause irritation, ingrown hairs, or scarring.
In some individuals, the change in color of pubic hair may occur around the age of fifty, but it can happen earlier or later, depending on individual genetic predispositions and lifestyle factors.
Based on these findings, we hypothesize that pubic hair evolved with a thicker cuticle layer to better protect the hair interior, especially in environments that come into contact with urine.
Methods of at-home hair removal include trimming, shaving, tweezing, waxing, and hair removal creams. Those who would prefer professional treatment may wish to consider salon waxing or, for a more permanent solution, laser therapy, or electrolysis.
Asian hair and Caucasian hair handle stress and fatigue well. Asian hair has the highest hardness and elasticity. It is resistant to stretching and can withstand a traction force of 60 to 65 grams.
There is no specific ethnicity that can't grow facial hair, but East Asian individuals, such as Japanese and Chinese, tend to have less facial hair and slower growth rates compared to other ethnicities.
The average diameter, or thickness, of Asian hair is from 80 to 120 µm, compared to 65 µm in Caucasian hair and 55 µm in Black hair. The average diameter of Hispanic/Latino hair tends to fall between that of Asian and Caucasian. Caucasians have the highest hair density among the ethnicities studied.
In the United States, it may seem like more and more girls are hitting puberty early. This trend may be related to the increasing rate of obesity in the country. Researchers link a higher body mass index (BMI) to early breast development. Eating a lot of processed, high-fat foods may cause early puberty.
Kids start to have body odor around the time puberty starts and hormones change. Usually, this happens when females are 8–13 years old, and males are 9–14. But it can also be normal to start puberty earlier or later. Bathing every day, especially after a lot of sweating or in hot weather, can help with body odor.
White pubic hair may result from simple aging, in which the skin produces less melanin as the body ages. However, some conditions, such as fungal infections, lice infestation, or vitiligo, may also result in white pubic hair.
Shaving your armpits is indeed shown to reduce your body odour, because when you have a lot of underarm hair, sweat is able to collect there more easily.
No — shaving hair doesn't change its thickness, color or rate of growth. Shaving facial or body hair gives the hair a blunt tip. The tip might feel coarse or "stubbly" for a time as it grows out. During this phase, the hair might be more noticeable and perhaps appear darker or thicker.
Shaving leaves the thicker blunt end behind, compared with the fully grown tapered unshaved hair. Before shaving your arms you should consider, regrowth (stubble), possibility of ingrown hairs , dry skin or even shaving rash.