Many people in life have the habit of washing their hair with cold water, because it is very convenient to wash their hair. However, washing your hair with cold water will have certain effects on your health. So what are the dangers of washing your hair with cold water? What are the dangers of washing your hair with cold water? Washing your hair with cold water will have a certain impact on the scalp, brain, and blood circulation. Let’s learn more about the dangers of washing your hair with cold water.

1. Causes headaches

The scalp is one of the areas with the most nerves. It is closest to the brain and is very sensitive to external stimulation. Washing your hair with cold water will cause the scalp to shrink suddenly, and the nerves will be suddenly stimulated by cold, which will cause a stress reaction and cause headaches

2. It is easy to cause colds

The temperature of the scalp is relatively high compared to the outside world. Especially in the summer when you are sweating profusely, the hair follicles on your scalp are open. If you suddenly pour cold water on it, the pores will shrink and the cold air will invade, which can easily cause a cold.

3. Cause abnormal scalp blood vessel function

The temperature of the scalp is high and the blood vessels are in a state of expansion. If you rinse it with cold water, the cold stimulation will force the blood vessels to contract, which may cause intracranial blood vessels. Functional abnormalities can induce dizziness, dark eyes, vomiting, and in severe cases, intracranial hemorrhage.

4. It cannot be washed clean

Warm water can expand the opening of sweat pores and promote the excretion of metabolic waste. It also has a stronger ability to dissolve oil stains than cold water, making it cleaner. Cold water will shrink the sweat pores and affect the dissolution of metabolites in the shampoo.

5. What is the best water temperature to use to wash your hair?

It is best to wash your hair at a water temperature of 37°C-39°C. Washing your hair with water that is too hot is not good for your scalp health and can easily cause colds and headaches. However, washing your hair with water that is too hot can also easily burn your scalp, leading to a decrease in the scalp's resistance. It can also damage your hair, making it fragile and easy to break. Generally, it is recommended to use 37°C-39°C water temperature for washing.

6. Instructions for washing your hair

1. The best time to wash your hair is 9 p.m.

Because scalp cells from 10 p.m. to 2 a.m. During the regeneration and active phases, washing the scalp before this can promote scalp cell regeneration. In fact, it is more suitable to wash your hair from 1 pm to 10 pm. The most unsuitable time for washing your hair is from after 10 pm to the morning. This is the period when the scalp is relaxed and resting, so it is not suitable for excessive stimulation.

2. Blow-dry your hair before going to bed

There are many dangers to sleeping with wet hair, such as easily catching colds, easy damage to hair scales, increased hair loss, deterioration of hair quality, etc. Make sure your hair is more than 90% dry before going to bed. This can reduce damage to the hair cuticles and keep your hair supple for a long time.

3. Do not comb wet hair

After washing your hair, the hair scales are still open. If you comb your hair too many times at this time, it will cause obvious damage to the hair scales. , hair will become very frizzy after drying.

4. Don’t scratch your scalp with your nails

Don’t scratch your scalp with your nails while washing your hair. Although it feels good, it may cause damage to your scalp. The correct way is to use your fingers. Gently press the scalp with your belly.

5. Do not pour shampoo directly on your head

Shampoo must be poured into the palm of your hand first, rub it evenly before washing your hair. If you pour shampoo directly on your scalp, it will easily cause chemical residues, and the cleaning effect will not be ideal (not conducive to foaming).

6. The water temperature is about 40 degrees.

Washing your hair with cold water is the most irritating to the scalp and may cause hair loss! Washing your hair with too hot water can also damage hair follicles. The best water temperature is It's about 40 degrees, just feel a little warmer than body temperature.

7. It’s better to wash your hair less often

If your hair is not greasy, don’t wash your hair every day, because washing your hair will cause the hair scales to open, and the hair scales will be opened. From opening to closing, this process inevitably involves some loss, so washing your hair every day is not conducive to better hair quality. But some people's hair is very oily, so they can wash their hair once a day, because keeping it clean is much more important than the loss of hair cuticles.

8. Keep your head slightly lower when washing your hair

When washing your hair in the shower, many people stand up straight while washing. In this case, the impact of the water flow may cause hair loss on the top of the head than in other places. More, so the better way is to lower your head to the level of the heart, which can reduce the impact on the hair and promote blood circulation in the head.

9. Silicone-free shampoo

If your hair feels greasy and heavy and cannot be washed clean, you can consider using silicone-free shampoo. This type of shampoo is cleansing. The power is relatively strong, and it feels refreshing after washing.

10. Be sure to dry your hair after washing your hair

Many people wait for their hair to dry naturally after washing, which is actually not good. When a person washes his hair, the hair cuticles are open. Opening means fragile, and some dust, bacteria, and dirt will take advantage of it. Therefore, after washing your hair, it is best to wipe it with a towel until it is 60% to 70% dry to promote the closure of the hair scales, which is more conducive to reducing the damage to the hair caused by frequent shampooing.