It depends on the purpose of the egg mask and the type of oil used on your hair. While applying an egg mask to oiled hair isn't inherently harmful, the oil can create a barrier that prevents the egg's nutrients from fully penetrating the hair shaft.
Here's a more detailed breakdown:
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If your hair is excessively oily: Applying an egg mask to already oiled hair could exacerbate the problem, leaving your hair feeling greasy and heavy. In this case, it's best to apply the egg mask to clean, un-oiled hair. Egg whites are particularly effective for oily hair.
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If you're using the egg mask for protein treatment: The oil might hinder the egg's protein from binding effectively to your hair. To get the most out of the protein treatment, apply it to clean, slightly damp, and un-oiled hair.
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If you're using the egg mask for added moisture: If your hair is dry, a light layer of oil before the egg mask could potentially help lock in moisture. However, avoid using excessive oil, as this will definitely block the egg's benefits.
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Type of Oil Matters: Heavier oils like castor oil are more likely to create a significant barrier than lighter oils like argan or grapeseed oil.
In Summary:
Applying an egg mask to oiled hair is generally not recommended, especially if your hair is already oily or you're using the egg mask for protein treatment. For best results, apply the mask to clean, slightly damp hair. If your hair is dry and you want to use oil, apply a very light layer of a lightweight oil.
