After thoroughly rinsing out the permanent solution with warm water, a neutralizer must usually be applied for five to eight minutes to set the curl. Remove rollers and then rinse off neutralizer thoroughly with cool water. The Makings of a Bad Hair Day Hydrogen peroxide in permanent solutions can cause reddish highlights in dark hair. Frizziness can result from perming too aggressively or too frequently. Those with fine, thin hair may end up with uneven curls.
Damaged hair can break easily after perming.
Solutions can irritate the scalp. Powerful Chemicals Do not use if you are allergic to any ingredient in the product. If any chemicals or rinse water gets in your eyes, rinse thoroughly with warm water and direct the stream of water away from the scalp rather than toward it. Use protective gloves when applying chemicals. Avoid contact with eyes, nose, and mouth.