Hair can be relaxed and colored at the same time, depending on the condition of the hair. Performing the two treatments together causes the hair to become significantly more porous, which can lead to brittle and dry hair.
A hairstylist often inspects a client's hair thoroughly to determine whether relaxing and coloring the hair at the same time is a good idea. If a clients decides to get a relaxer and color treatment in the same day, the hair should be conditioned daily to prevent dryness. The hair should only be shampooed when it is significantly oily so as not to strip the tresses of moisture.