How long should I wait after scratching my scalp to apply a relaxer? 24 hours? 48 hours? Longer? I really need help on this one quick. I have a job interview monday and I really need to relax my hair. Would it be all right for me to just put grease or vaseline on my scalp before relaxing it to avoid chemical burns so that I could go ahead and relax my hair even though I scratched it earlier today? HELP!!!