The blood pressure inside your arteries is constantly changing as your heart pumps blood. High blood pressure is when the blood pressure is always higher than normal. Blood pressure is actually lower in the summer and higher in the winter.
If a person has high blood pressure it means that the walls of the arteries are receiving too much pressure which over the years can wear out the lining of the arteries leading to lots of circulatory problems. It can also damages organs like the eyes, kidneys, heart and brain.
“A single high blood pressure reading does not necessarily mean that you have high blood pressure. It is normal for your blood pressure to rise and fall during the day. It increases during physical activity or when you are excited, angry or afraid and these are usually short-lived episodes. You are usually considered to have high blood pressure if your blood pressure stays high for three separate readings over at least three months.” – HeartFoundation