To understand why hair loss happens, it's important to know what hair is and how it grows. Simply explore our interactive description of the hair growth cycle.

Hair is found almost everywhere on the human body. Its forms range from thick, wavy tufts on some scalps to the tiny fair-coloured strands that dot almost every portion of our bodies except the palms of our hands and the soles of our feet. The structure and growth cycle of all human hair is the same.