One common topic I often get questions about is follicular units. A common misconception about hair growth is that all hairs grow out of the scalp separately (aka “single hair growth”). While there are singular hairs that do in fact grow individually, the rest of the hairs, known as follicular units, grow very close to each other, and sometimes even out of the same exit point. They appear as closely-clustered units consisting of two, three, four, and sometimes even five terminal hairs per grouping.