What are the dangers of washing your hair with cold water in the morning?

Many people often wash their hair with cold water in the morning because they are in a hurry. Especially some students, they directly put their heads under the cold water pipe, use some shampoo, wash their hair in a hurry and run into the classroom. In fact, this practice is very harmful to the body. If you often wash your hair with cold water, it may cause headaches. Let me introduce to you the dangers of washing your hair with cold water in the morning!

Compared to warm water, washing your hair with cold water is much less effective. Because warm water can dilate the skin capillaries and the superficial blood vessels of the dermis, open the sweat pores, and promote the excretion of metabolic waste. Its cleansing power is stronger than cold water, and dirt attached to the hair shaft is easier to remove. On the contrary, the sudden stimulation of cold water causes the skin capillaries and superficial blood vessels in the dermis to contract, which in turn leads to the contraction of sweat pores, blocking normal skin metabolism. Dirt that could have been removed and some metabolites hidden in the sweat pores that should have been excreted will remain in the body. Over time, you will find that not only will your hair not be washed clean, but using cold water to wash your hair for a long time will also cause hair loss due to metabolic disorders.

Our scalp is one of the areas with the richest nerves. It is closest to the human nerve center - the brain, and is closely connected to it. Our nerves will react when they are stimulated, and the brain's excitation and inhibition have certain limits. If we continue to stimulate the parts that should be inhibited, the rules of excitation and inhibition will be disrupted, causing disease. This neurological disease is medically known as neuralgic headache. Neurological headaches are divided into three categories: functional headaches, vascular headaches and tension headaches.

Headaches caused by cold water stimulation are tension headaches. The sudden external or self-stimulation of the nervous system causes the nerves to become highly tense and produce a stress response, which in turn causes headaches. Most patients have bilateral headaches. Long-term exposure to cold water can easily cause persistent headaches for years.

At the same time, due to the sudden stimulation of cold water, the abundant capillaries in the scalp will suddenly contract. This contraction will cause the volume of cerebral blood vessels to be less, and blood pressure will rise accordingly, causing vascular headaches. Tension headaches and vascular headaches add up to form mixed headaches.

If this happens every day for a long time, the pain will escalate and will be accompanied by symptoms such as dizziness, irritability, anxiety, palpitations, shortness of breath, fear, tinnitus, insomnia, back pain, and neck stiffness. Some patients have obvious tender points on both sides of the neck and pillow. The patient may even have a headache all day long, with more time spent with the headache than without it.

After reading the above introduction, I believe you have a certain understanding of the harm of washing your hair with cold water in the morning. If you often wash your hair with cold water, it will cause persistent headaches, and even back pain, stiff neck, anxiety and other symptoms. Therefore, it is best not to wash your hair with cold water, especially in the morning. It is best to wash your hair at noon.