When you buy a box of hair color to apply at home, you should definitely take the time to read all the instructions. What many people either fail to see or choose to ignore is the reminder to do a “patch test“ before application. Simply put, the manufacturer advises that customers try out a little bit of the product on their skin for a couple of days to check if there will be any negative reaction.
Some people who have skipped this step might end up regretting it. The fact is, most at-home hair color products have harsh ingredients like ammonia. For those with sensitive skin, they might experience some irritation or worse, an allergic reaction to ammonia or the other harsh chemicals in the product.
Some people think that just because they have used the product before, they should be on the clear. This is not true, as allergies can develop anytime and without any warning. Moreover, companies like to make some changes to their formula regularly.
To do a patch test, simply create a small mix and apply it on a hidden part of skin with a cotton swab. Wait up to 2 days to see if there are any reactions. When you experience any redness, burning, or itchiness, then this is a sign to skip this brand. After all, you can only imagine how an irritated head will feel and look.