This document provides information on assessing and treating dehydration in children. It defines dehydration as an excess loss of water and body fluids, and lists various causes including gastroenteritis, fever, burns and more. It describes methods for assessing dehydration severity based on weight loss, clinical signs/symptoms, and skin pinch test. Mild dehydration shows thirst and sunken eyes; moderate shows lethargy and poor drinking; severe shows collapse and sunken fontanel. Oral rehydration solution is given as treatment, with recipes provided for making solutions with salt, sugar and water.