Explaining Biology on Instagram: "A hair splinter may look harmless, but under the right conditions, it can become surprisingly painful. Human hair is incredibly strong and sharp at the tip, especially when freshly cut. When it penetrates the skin, it behaves just like a tiny needle, slipping beneath the surface and causing irritation, redness, and discomfort. Because hair is thin and dark, it’s often hard to spot, making removal tricky and sometimes leading to infection if ignored. This close-u