Facts about Hair
Trichorrhexis nodosa — is a disease, which manifests in extremely high fragility of hair. In most cases, hair breaks at a distance of 7 cm from skin surface. At this disease not only hair on head are affected, but also those that grow in pubic area, in men mustache and beard can also be damaged.
Trichorrhexis nodosa is not a contagious disease. The main cause of this disease – roots damage. It can be caused by using unsuitable shampoos or hair products, frequent use of «hot» methods of styling, over-drying in the sun and so on. If your hair is dry by nature, risk of the disease increases.
Trichorrhexis nodosa may also be congenital. This disease may be accompanied by a variety of hereditary syndromes that occur, including skin lesions.
Blow drying hair and other similar procedures can significantly reduce moisture content and be detrimental to hair in general. All heat-devices for hair styling in the first place soften keratin contained in your hair. If they are heated more than it is advised, they can literally boil water in hair and small steam bubbles as a consequence appear inside softened hair shaft. Hair is thereby becomes weak and may break as a result.
Inevitably, bubble hair is triggered by some heating device, most often hair curlers. They are applied at a temperature somewhere between 120 – 180 °C, roughly speaking. Water boils at 100 °C. If use hot curler on wet hair, it will boil water inside it. Boiling water softens keratin in cortex; then steam expands and causes small bubbles inside hair appear. As a result hair breaks, either at or near bubbles.
Let’s learn about Hair!
Without proper resources and good support system, you are just left to your own devices of trial and error… That’s why this website is here – to tell you all you need to know about hair, its structure, what it needs, what shouldn’t be applied and finally reveal all misinformation, myths and lies that still keep existing and floating around hair care. If you know basics of science about hair, you have chosen the right path to properly dealing with it.
All hair has the same structure no matter whose head it’s on. That’ means that all human hair consists of three main: cuticle, cortex and medull.
Cuticle is outer layer of hair. It is intended to protect inner layers of hair shaft, cuticles can be compared to roof shingles. Those that lay flat against hair shaft provide the best protection. They are often damaged by excessive mechanical actions such as brushing and/or using heating or chemical means for styling. Also routine factors, such as sun or wind, can cause damage of your hair and cuticles as well.
It is the second layer of hair, which consists of long proteins that twist like a curly telephone cord. This is also a part of hair that bears great responsibility for its overall strength, elasticity and color. There is a simple test to check your hair condition: stretching hair strand. If it stretches, it means it’s in good condition. When stop stretching, hair should return to its initial length. Dry and fragile hair does not maintain enough moisture content in cortex. As a consequence, it doesn’t show enough elasticity to endure mechanical and chemical styling and will break very easily.
The worst condition of cortex manifests itself in split ends and midshaft damage. This happens because protective cuticle has been worn out and doesn’t protect cortex any more. As soon as your cortex is exposed to outer factors, hair has no time for repair and is damaged easily. Since hair is a «dead» tissue, it has no healing properties like your skin, which means it can’t regenerate. Damaged hair can be partially restored by using various products, however, it will never be fixed completely. They will either break by itself, or in case of split ends, cutting them will be your own choice.
It is the innermost or central part of your hair shaft. It consists of round cells arranged in two to five rows across. Thick or coarse hair usually have medulla. Thin hair most often lacks medulla, as naturally does blond hair. Medulla purpose has not been determined yet.
Hair science distinguishes three hair types: African, Caucasoid and Asian.
Nappy African hair, characteristic of African people, is almost flat or ribbon-shaped, twisting, bending and zigzagging while growing. At every twist hair becomes thinner and therefore susceptible to breakage at each of these points along hair shaft. Because of such shape, cuticles of nappy hair appear to be raised, not laying flat against hair shaft. Consequently, curly hair absorbs light, not reflecting it. That is, such hair does not shine. Raised cuticles also function as opened doors, making it very porous. It absorbs moisture like sponge but also has difficulties retaining it; i. e., nappy hair is naturally dry. Raised cuticles also lead to the fact that curly hair feels coarse to touch, rub and catch easily on one another forming tangles and knots and become even more susceptible to breakage and damage if not take care of it properly.
White folks’ hair has more oval shape. The more oval in shape the hair is, the more likely it is to be wavy. The more round in shape the hair is, the more likely it is to be straight. Caucasoid hair cuticles usually lay flat, making it possible for hair to retain moisture, reflect light and shine.
Hair of Asian people is almost perfectly round which leads to bone straight hair. Its cuticles lay flat, hair reflects light, is very strong and holds moisture.
Learning about these differences can help you to make best choice when deciding on how to take care of and style your hair without expecting to make your hair perform or look something it’s not supposed to do.