Sep 20, 2017 - In milder cases, permanent dyes can cause itching, skin irritation, redness, or swelling on your scalp or other sensitive areas like your face and neck. Dec 20, 2006 - Yes, getting highlights does dry out your hair. If you enjoy going swimming, the highlights will get damaged, as well as the hair that grows out of . What are the possible negative effects of highlighting on your hair? Feb 21, 2010 - I have ';black'; hair and it has natural highlights so its like a dark . Oh, and will it look bad after a couple months because the roots show or will . Feb 2, 2016 - While colouring hair is fun, there are a lot of side effects that you need to be aware of. The symptoms and damage caused by hair colour may not always show up immediately. It may take up to several days or even weeks after hair colouring sessions. Find out the side effects of hair colouring and how the condition of the hair . types of hair colouring that includes highlighting and using unusual colours as well. Sep 9, 2011 - Highlights and coloring -- Highlights and semi-permanent dyes aren't as damaging as bleach, but they aren't without consequences, Mirmirani says. They can also change the inner structure of the hair, causing a lackluster look and dryness, especially if you frequently color to hide roots or gray hair. Before you hit up the salon, read these dos and don'ts of highlights for hair.