Why does cloudy day cause dizziness and chest tightness?

Your discomfort is caused by insufficient blood supply to the brain. When the weather is hot, vasodilation (blood vessels expand with heat and contract with cold) will slow down the blood flow to the brain, resulting in insufficient blood supply to the brain, which will cause you discomfort. In rainy days, due to the reduction of atmospheric pressure, the partial pressure of oxygen in the atmosphere will also decrease, and the oxygen content in the blood will decrease, which will make the brain hypoxic and cause dizziness, headache and other discomfort.

This situation usually occurs in patients with insufficient blood supply to the brain, so even in such weather conditions, normal people will not have discomfort symptoms such as dizziness and headache. Cerebral blood supply deficiency is common in abnormal blood pressure (hypotension and hypertension), hyperlipidemia, hyperglycemia, anemia and other diseases. Most young people are caused by low blood pressure, and there are many factors that affect blood pressure. You need to measure your blood pressure several times (three times is different from daily use), but measuring it only once does not explain the problem.

For details of cerebral blood supply deficiency, please refer to my Baidu space, which has a detailed explanation (1, why dizziness and headache are difficult to treat. 2. Life and self-care guidance for patients with dizziness and headache).

May you find out the cause as soon as possible and get well soon!