Nikka loves playing volleyball, her motto is "Eyes on the ball." This motto made her very eager to get the ball before it lands on their side of court. Because of this she acquired small wounds and scrapes. She didn't paid attention to this at first but later on it became more painful and she noticed that little amount of sticky yellowish liquid is coming out from the wound. As a first aider, how will you explain to Nikka the principles of dressing?