Side Effects of Hair Colouring are

Poor quality - If the quality of the dye is poor it will have adverse effect on the hair of the person. Many people like to save money and do not opt for good quality hair dyes or colours. However it is not essential that the hair colour that is the costliest will not have any side effect on your hair. There are other factors also that matter and other reasons of bad effects of hair colouring.

Application not done properly- Nowadays youngsters are going after highlighting their hair. This has very bad impact on the health of the hair. However, applying it properly and with proper precautions can save your hair to a great extent. The looks also get affected if highlighting is not done properly.

Over treating - Over treating happens when the colour or the dye is left on hair for longer period of time. Even if a relaxer or perm is left for longer time on the hair for more than it should be left, it affects the hair badly.

Under treating - Colouring of hair takes time and the colour has to be left applied on hair for some time period. If the colour is not allowed to set and it is removed or washed before time, it will not be able to cover gray hair. If the intention is to highlight your hair, it will give faded results and you will not get the outcome that you wished.

Reactions due to allergy - Hair colour causes allergy to many people. This is why every hair colour company advices to take a patch test before applying the colour to your hair.

Bad effects of chemicals - Usually the hair colour that you will buy in the retail shop contains chemicals and since there are varieties of chemical used they have their effects on your hair. The chemicals may have adverse effects on your hair so it is essential that you find out the whereabouts of the dye you are using and then take the patch test so that you know whether it is safe for you or not.