Grange Street Surgery
2 Grange Street, St Albans, Herts AL3 5NF


In approximately 90% of cases, the cause of hypertension is unknown. This type of hypertension is known as essential hypertension. Essential hypertension is very common, and may affect as much as 20% of the adult population.

My Simple Guide - Blood Pressure Advice on lifestyle

NHS Choices - Hypertension - Symptoms, causes, treatment