<s>[INST] What causes high blood pressure ? [/INST] For the vast majority of people with high blood pressure no precise explanation is ever found. For this reason, such cases are said to have ‘essential’ hypertension. These cases are likely to result from a range of factors that could be broadly grouped into genetic and environmental (lifestyle) factors that work together to raise blood pressure. Because genes and environmental are shared within families, it is not uncommon for people with high blood pressure to know of relatives with the same condition. In a minority of cases of hypertension (less than about 5%) a precise cause can be identified. These include hormonal imbalances and kidney diseases that can result from genetic problems, occasionally tumours (usually benign) and blood vessel narrowing. Doctors are trained to look for signs of these specific conditions, as they are often curable. Source: International Society of Hypertension. Link: https://ish-world.com/faq/. Field: Cardiovascular. Disease: Hypertension </s>