Getty | CSA Images, H. Armstrong Roberts, NSA Digital Archive, subjug, Photo Illustration: Ava Cruz Getty | CSA Images, H. Armstrong Roberts, NSA Digital Archive, subjug, Photo Illustration: Ava Cruz

If it seems like you've been encountering more people wearing red nails than ever on social media, you might be onto something. In the past 12 months, online search for red nails have increased by 160 percent globally, according to Fresha . It's not just that celebrities like Taylor Swift and Selena Gomez have caused interest in the shade to skyrocket or the fact that color is trending in beauty — this is a long-standing TikTok trend that has become known as the "red nail theory."

People on the app are claiming that there's a deeper reason some are drawn to this particular color of

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