Patches for the chin from black dots with charcoal "Black dots" (and scientifically comedones) appear due to clogging of the ducts of the sebaceous glands. At the tops of these plugs, dirt, makeup residues and dead epidermal cells accumulate, all this oxidizes and turns black (or dark brown). These black dots are not only an aesthetic inconvenience, but they are also an ideal breeding ground for bacteria, which leads to acne. There are many different means to combat black dots. So, for example, special patches for the nose are very popular.