Colgate Zig Zag Medium Toothbrush Too Hard, Causes Gum Bleeding
In September 2025, I purchased a Colgate Zig Zag medium toothbrush. I used the product only once, and despite being labe...led as medium, it turned out to be extremely hard. It severely irritated my gums, causing bleeding and a burning sensation. The bristles dug into my gums and caused sores. Because