I was told that washing my hair with cold water would easily lead to Alzheimer's disease in my old age, which shocked me. Is it true?/You don't say.

Cold water is not good, the head is the first of the five yang! Wash with hot water, don't wait until you get old. It's okay to take a bath in cold water, but it must be done step by step. Spring begins and winter suddenly begins, and the body can't stand it. _ The wind room and the wind pool point behind the head are very fragile, so people in cold weather wear scarves to protect these two points. If they wash their hair with cold water for a long time, not only will the human body shrink when it is cold, but it will open when it is hot, so moisture can easily enter. In the future, they will have headaches and brain fever. Dry it immediately, and take a shower, too. Get dressed and go out without airing. When it's cold, your pores will shrink and moisture will be in your body. It gets hot when you wipe your hair, so it gets wet. The so-called cold is easy to dehumidify evil, but difficult to dehumidify evil. Rheumatism plagues many people. Now it is no longer the patent of the elderly, and middle age is also very common. For your own health, pay attention. It is not good to wash your hair with cold water for a long time! Headache caused by washing your hair with cold water Many people like to wash their hair with cold water when sweating in hot weather, which is easy to cause headaches. Because people's intracranial arteries and blood vessels are very sensitive to pain, in the hot season, the head is prone to sweating after exercise. At this time, the blood vessels dilate. If washed with cold water, it may cause abnormal intracranial vascular function, dizziness, blackness in front of eyes, vomiting and other symptoms, and even cause intracranial hemorrhage in severe cases. Therefore, you must wash with warm water after a lot of exercise, and the elderly with cardiovascular and cerebrovascular diseases should pay more attention. The temperature of shampoo is 3 1 ~ 38℃. Too hot water can easily damage hair, making it brittle and easy to break. If the water is too cold (cold), the oil stain removal effect will be poor and the washing will not be clean. When changing water, the water mixture used successively should be roughly the same, and it is not advisable to cool before heating or heat before cooling. It is best to use warm water, because warm water can dilate skin capillaries and superficial dermis blood vessels, open sweat pores and promote the excretion of metabolic wastes, so the detergency is stronger than cold water, especially the dirt attached to hair shafts is easier to be removed. If you wash your hair with cold water in cold winter, it will also cause a cold. Even in hot summer, the difference in head temperature can lead to diseases such as colds.