Adverse effects of hair coloring
Hair coloring involves the use of chemicals capable of removing,
replacing and/or covering up pigments naturally found inside the
hair shaft. Use of these chemicals can result in a range of adverse
effects, including temporary skin irritation and allergy, hair
breakage, skin discoloration and unexpected hair color results.
Additionally, there is ongoing debate regarding more serious
health consequences of hair color usage, including lead
poisoning.
In certain individuals, the use of hair coloring can result in
allergic reaction and/or skin irritation.
Symptoms of these reactions can include redness, sores, itching,
burning sensation and discomfort. If any of these symptoms occur,
alert your hair colorist immediately so that they can remove the
color. Symptoms will not always be present right at the application
and processing of the tint but can also arise after hours or even a
day.
To help prevent or limit allergic reactions, the majority of
hair
color products recommend that the client conduct
a patch test before using the product. This involves mixing a small
quantity of tint preparation and applying it directly to the skin
for a period of 24 hours. If irritation develops, manufacturers
recommend that the client not use the product. A skin patch test is
advised before the use of every coloring process, since allergies
can develop even after years of use with no reaction.
Adverse reactions can result from both at-home and salon hair
coloring products, as similar chemicals are used in both
settings.
In some cases, allergic reactions are caused by the aniline
derivative and/or p-Phenylenediamine (PPD) found
in permanent hair color.
Hair that has been damaged by excessive exposure to chemicals is
considered 'over-processed'. This results in dry, rough and fragile
hair. In extreme cases, the hair can be so damaged that it breaks
off entirely. This is especially true for Afro-textured hair,
especially if used in combination with relaxers. Treatments are
available but the only real solution is to stop the use of
chemicals until the hair recovers.
It is advised that colored hair be deep conditioned regularly,
and washed and conditioned with gentle products specifically
designed for color-treated hair. This will help keep the hair
intact, as well as ensuring that the color doesn't fade as
quickly.
Skin and fingernails are made of the same type of keratinized
protein as hair. That means that drips, slips and extra hair tint
around the hairline can result in patches of discolored skin. This
is more common with darker hair colors and persons with dry
absorbent skin.
This discoloration will disappear as the skin naturally renews
itself and the top layer of skin is removed (typically takes a few
days or at most a week). A good way to prevent dye discoloration is
to put a thin layer of Vaseline or any oil-based preparation around
the hairline. It is recommended that latex gloves be worn to
protect the hands.