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Negative effects of bleaching hair

Coloring your hair can be excellent for hiding those pesky gray's or just boosting your inner awesomeness. However, over coloring can cause dry or brittle hair because of things like ammonia and peroxide penetrating the hair shaft and follicles, causing the once closed/smooth shaft to now to be ragged and open, which causes moisture loss.

Negative effects of bleaching hair

Scalp irritations generally occur on those with sensitive skin, but a patch test is usually advised 24 - 48 hours before any color service. If you have a sensitivity to the color, your scalp will most likely start to tingle. If this is the case, you may want to rinse the color out and do a patch test to avoid an allergic reaction or soreness to the scalp.

Lastly, hair loss or a "chemical haircut" usually doesn't happen from applying color, but instead happens from over-applying bleach. If you over-bleach your hair, it can lead to significant damage causing the hair to break anywhere on the shaft.

Pilot Error

If done correctly with the correct products and by a highly trained, educated, and skilled professional, any potential adverse effects of dying hair is usually very negligible.

Yes, there are potential adverse effects, but a lot of the problems with dying hair are directly due to pilot or user error.

What do I mean by that?

Negative Effects May Include Over Processing To Hair Breakage

In the hands of a hair consumer with little knowledge or experience death, the hair can become a jumble of problems ranging from over-processed hair and breakage to actual health hazards such as allergic reactions.

Unfortunately, severe allergic reactions to hair dye are more common than most people realize.

Always Start With A Patch Test

Any hair dying, coloring, or bleaching start with a patch test to guarantee that there is no allergic reaction.

The need for a patch test is especially real when hair color is going to be applied at home by an unskilled hair colorist who may not be able to spot the initial signs of a reaction.

Allergic reactions to hair dye, color, bleach, and similar are more common than many hair consumers know.

A Well Ventilated Space

Hair color and related chemicals must always be applied in a well-ventilated area, especially is the person receive the hair dye has any chronic lung issues such as asthma, chronic bronchitis, COPD, or any lung disease.

Mucous Membrane Irritation

Besides the need for ventilation to prevent triggers of lung irritation, the eyes and nose should be covered to protect against irritation to the mucous membranes.

When I have my hair highlighted by a professional hair colorist in a highly ventilated salon, I always ask for a clean towel to cover my eyes, nose, and mouth to minimize any inhalation of color chemicals.

If you tend to develop eye, nose, or throat irritations, it's essential to ask for a clean towel or use a wet washcloth to prevent any complications such as swollen eyes, scratchy throats, or drainage.

Can you get pink eye or other diseases from hair dye? It is sporadic, but anything is possible. If you are concerned as your professional hair colorist to take any necessary precautions on your behalf.


Almost most medical professionals do not generally warn against the use of hair dyes or color during pregnancy; some do express concerns.

Always check with your physician if you are pregnant to determine any restrictions you should follow concerning hair dye, color, or bleach.

Some fertility specialists have also indicated that the metals and chemicals in some formulations may be an anti-fertility compound.

When in doubt, if you're trying to conceive, be sure to ask your fertility specialist if you or your partner can use hair dye, color or bleach.

Immune System Disorders

In some rare cases, hair dye, color, or bleach may cause an adverse reaction to some people suffering from any severe immune system disorder. When in doubt, always check with your primary care physician for proper guidance.

Toxic Reactions

Some experts believe that certain types of hair dye contain high levels of toxins, which might contribute to the development of cancer.

One specific concern is black dyes, which contain chemicals considered to be potentially carcinogenic.


Hair dye, color, and bleach offer significant advantages, but like many other chemicals utilized in the hair industry, they may come with their risks and adverse effects.

When in doubt, always do your homework, go to a professional hair colorist with extensive experience, and don't be afraid to ask lots of questions to guarantee you know what risks you are dealing with.

Remember, knowledge is always power.

DISCLAIMER: I neither sell nor promote any companies, their products, nor do I have any online shopping outlet of my own to support. What I write is based upon my personal experience and belief in the techniques I share.


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