Recently, in our neurology clinic, we often encounter young female patients who come to the clinic with headaches, often with a feeling of tightness in the head, inability to concentrate at work and study, and even a feeling of detachment from the outside world and a sense of unreality in their surroundings. It turns out that all of them are related to low blood pressure. Therefore, we would like to remind you to pay attention to the occurrence of hypotension in summer. What is the relationship between heat and low blood pressure? Heat causes blood vessels on the skin surface to dilate, resistance to decrease, blood flow to increase, and easy sweating, which eventually leads to a decrease in blood volume and lower blood pressure. Therefore, experts remind: such patients suffering from cerebrovascular disease, weak people and people who work in high temperature for a long time should pay more attention to the occurrence of hypotension. Warm advice: patients taking antihypertensive drugs, pay attention not to change the medication, can be appropriate to “drug holiday”, that is, to give drugs on vacation. Patients with cerebrovascular disease and Parkinson’s disease, when you get up in the morning, change your position slowly and do not move too hard or too fast to prevent the occurrence of postural hypotension. For young women with weak constitution, take appropriate regimen such as raw pulse drink. In conclusion, taking a glass of slightly light salt water to replenish blood volume in the morning in summer is beneficial to prevent hypotension.