High blood pressure is a common problem and causes insomnia, headache, bad mood. However, high blood pressure is not harmless, as it may increase the risk of heart attack, heart disease and other illnesses.
The most common cause of high blood pressure is junk food, so you should eat a healthy diet, not much salt and fat. They increase blood pressure and also damage the kidneys.
Normal blood pressure varies from one person to another. It is considered, that the normal blood pressure of 130/85 is in adults.
However, it is not necessary to know, because the blood pressure is different depending on age. So it would be good to look at this table and it will be much clearer.