The first objective of this book is to remind all pediatricians that hypertension in children does exist, and that it can be easily diagnosed and managed. The covered topics range from the regulation of blood pressure and its assessment in children to day-to-day management. The attached calculator provides a hypertension assessment software: entering data about sex, height, systolic and diastolic pressure, the program indicates the presence and severity of hypertension. On the basis of international guidelines, it further suggests the opportunity of a treatment and helps to choose the appropriate among behavioral or pharmacological alternatives.