When Charlie takes a tumble off her bike and scrapes her knee, her sister Alex reassures Charlie that sheâ ll be okay. Alex tells Charlie all the ways her skin works hard to heal itself. Charlie learns how blood begins to clot right away to stop bleeding, how the body removes damaged skin cells and makes new ones, and how soap and water keep germs away to prevent an infection. Written by a dermatologist and a father of young children, How We Heal is a comforting story that will help kids feel less afraid and more empowered by learning about the resilience of their own amazing skin and how to care for their everyday cuts and scrapes.