Hair care
Hair may be colored, trimmed, shaved, plucked or otherwise removed with treatments such as waxing, sugaring and threading.
Hair care services are offered in salons, barbershops and day spas, and products are available commercially for home use.
Laser hair removal and electrolysis are also available, though these are provided (in the US) by licensed professionals in medical offices or speciality spas.
Head lice can be removed with great attention to detail, and studies show it is not necessarily associated with poor hygiene.
The wetting action is caused by the head of the shampoo molecule attracting the water to the hair shaft.
Conversely, the tail of the shampoo molecule is attracted to the grease, dirt and oil on the hair shaft.
Acidic shampoos are the most common type used and maintain or improve the condition of the hair as they do not swell the hairshaft and do not strip the natural oils.
Other options for applying color to hair besides chemical dyes include the use of such herbs as henna and indigo, or choosing ammonia-free solutions.
Furthermore, many professions require containing the hair for reasons of public health, and a prime example is the food industry.
Safety is usually the reason behind not allowing hair to fly loose on the backs of motorcycles and open-topped sports cars for longer tresses.
Scalp skin of babies and the elderly are similar in subdued sebaceous gland production, due to hormonal levels.
The sebaceous gland secretes sebum, a waxy ester, which maintains the acid mantle of the scalp and provides a coating that keeps skin supple and moist.
For babies and elderly, the sebaceous gland production is not at peak, thus daily washing is not typically needed.
Any chemical or physical trauma, such as heat, that weathers the hair may eventually lead to split ends.
The ends are considered old once they reach about 10 centimeters since they have had long exposure to the sun, gone through many shampoos and may have been overheated by hair dryers and hot irons.
When hair behaves in an unusual way, or a scalp skin disorder arises, it is often necessary to visit not only a qualified physician, but sometimes a dermatologist, or a trichologist.
Common concerns surrounding dandruff (often associated with excessive sebum); psoriasis, eczema, or seborrheic dermatitis.
An odor that persists for a few weeks despite regular hair washing may be an indication of a health problem on the scalp skin.
This would dry upon the scalp skin and flake off, appearing like dandruff and even causing itchiness, but have no health effects whatsoever.
Formulas for addressing this specific cause of lack of hair growth yet typically they require around three months of consistent use for results to begin to appear.
It is commonly noticed that hair seems thicker and shinier, even, during pregnancy and breast feeding in response to the influx of shifting hormones.
Vitamin B12 helps prevent the loss of hair and can be found in fish, eggs, chicken and milk.
[9] The essential omega-3 fatty acids, protein, vitamin B12, and iron, found in fish sources, prevent a dry scalp and dull hair color.
Dark green vegetables contain high amounts of vitamins A and C, which help with production of sebum and provide a natural hair conditioner.
Legumes provide protein to promote hair growth and also contain iron, zinc, and biotin.
Biotin functions to activate certain enzymes that aid in metabolism of carbon dioxide as well as protein, fats, and carbohydrates.
In order to avoid a deficiency, individuals can find sources of biotin in cereal-grain products, liver, egg yolk, soy flour, and yeast.
