While dimethicone allergies are uncommon, side effects after topical application could include redness, swelling, hives, inflammation and burning on the application site.
Is Dimethicone Harmful for Skin?
According to the CIR, there is no scientific evidence to support dimethicone allergies. While people may claim to be allergic, it is more likely that another ingredient is causing the allergic reaction, like a preservative. That said, if you experience any type of irritation from your products, such as swelling, redness, hives or burning, wash the product off the affected area immediately and consult with your doctor.
Is Dimethicone Harmful for Hair?
The NCBI reveals that silicones like dimethicone can have negative effects on curly hair because they can lead to buildup, weighing down the hair and making it look heavy and greasy. So, while there may not be scientific evidence that supports the claim that dimethicone is harmful to the hair, it may not be great for your style depending on your hair type. That said, some evidence shows the opposite effect, as the silicones help coat the hair shaft, which creates less friction when you brush or comb your hair, per the CIR.
Source: L'Oréal
