Why do you get crumpled when you soak your hands in water?

It's okay, everyone will. It'll be fine for a while after the hand is dry. There are two theories about this ......

Because water has the effect of relaxing and softening tissues.

Our ** is actually covered with a thin layer of grease, in order to prevent ** from absorbing water directly from the outside. However, when we soak in warm or hot water for about half an hour, this layer of grease will be removed by warm water, so it will begin to absorb water. Our **surface is an epidermal layer, and below the epidermis is the dermis layer; The epidermis is not completely tightly bonded to the dermis, and the epidermis is only tightly bound to the dermis by connective tissue in some areas, but not in others; Therefore, when the epidermis absorbs edema, the binding place is confined and concave; From the outside, the surface of the ** is concave and protruding, like wrinkles.

Since the palms and toes of the hands and feet are the thickest part of the epidermis of the whole body, the phenomenon of wrinkles is obvious. **Other parts of the body should also have this effect, but it is less likely to be detected. If you soak in water for too long, the epidermis absorbs water and swells, so it becomes wrinkled. In the past, some women specialized in washing clothes for others, their hands soaked in water for a long time, and their fingers were often wrinkled, which became an occupational disease (should be said to be a characteristic).

References: Physiology & Medicine.

Another way to put it :

Since the concentration of fluid in the body is higher than that of fresh water, when the fingers are immersed in fresh water for a period of time, water will flow into the epidermal cells, and the cells will swell and deform.

On the contrary, since the concentration of fluid in the body is lower than that of seawater, when we swim in the sea, water will flow out of the epidermal cells, and the cells will shrink and deform.

In addition, there are bundles of elastic proteins at the bottom of the skin that are tightly adhered to the epidermal cells, resulting in uneven contraction or swelling of the fingers, resulting in wrinkled skin.

Studies have shown that the thickest palms and soles of people's hands and feet have a protective effect on hands and feet, which is why they are most prone to wrinkles. The outermost layer, called the stratum corneum, is made up of tough dead cells. These cells are under the microscope and have some of the shape of paving stones.

In general, the stratum corneum is thin, about millimeters, but the thickness of the stratum corneum in the palms and soles of the feet is at or beyond millimeters. Under normal conditions, the cells of the stratum corneum are quite dry. If soaked for a long time, they will swell due to the absorption of water.

The cells below the stratum corneum, on the other hand, do not absorb water and therefore do not swell with the cells on the surface. In this way, the surface layer is naturally not smooth after expansion, and it looks wrinkled. Theoretically, swimming or bathing can also cause ** wrinkles in the chest and abdomen, etc., but because there is almost no stratum corneum to expand in these areas, only some tiny wrinkles appear.

Reason: The traditional view is that finger wrinkling is due to the swelling of ** due to prolonged soaking. Recent studies have shown that wrinkling is caused by soaking in water to constrict blood vessels, resulting in changes in fingertips, which is controlled by the body's sympathetic nervous system.

Many people have had the experience of washing dishes with their bare hands, and their fingers and fingertips begin to wrinkle after a while. British researchers have experimentally proven that finger wrinkling has a practical effect, which can enhance the grip on wet objects and prevent dishes from slipping.

Researchers believe this may have been the result of evolution, helping human ancestors walk and forage in humid environments. Wrinkles help to strengthen people's grip on wet objects, making it easier for people to pick up objects underwater or carry objects with wet surfaces.

You can only get what you're talking about if you're soaking in fresh water for a long time, and the reason is just like the one explained upstairs! But how long does it take for you to wash your face? You won't be soaked in water for half an hour, will you?

Xie Xiaozi is right, the reason is the reason he said, if you want to improve, you can put a small spoon of salt in the basin and soak your hands, it will be very effective.

After soaking my hands in water for a long time, why do I have layers of folds?

Due to the semi-permeability of the cell membrane, coupled with prolonged immersion in water during bathing, a large amount of water flows between the epidermal layer and the dermal layer. In addition, the epidermis layer is mainly composed of the stratum corneum, which swells after streaming, while the dermis layer below the stratum corneum is a connective tissue that does not swell due to a large amount of water absorption, which causes the volume difference between the inner and outer layers, resulting in the phenomenon of folding. The water between the stratum corneum and the dermis can also create a gap between the two layers, leading to the separation between the layers, which also promotes the occurrence of folds.

If it is accompanied by peeling, it is called dyshidrosis, and if you use public slippers and towels, you can spread it to other members of the family. Dyshidrosis is a type of hand eczema. People with this disease are generally prone to sweaty hands, and regular exposure to alkaline detergents and gasoline can also damage the natural protective layer of the hands, which can easily lead to this disease.

The disease is more common in spring and autumn, and is more common on the sides of the fingers, the abdomen of the fingers, and the palms, with small transparent blisters appearing, and then annular peeling. In some people, the blisters are not obvious, and they appear as peeling of the hands at the beginning, and the finger tips are more obvious. **Apply with triamcinone urea ointment.

For patients with sweaty hands, after not peeling the skin, you can use 2-3% formaldehyde to soak your hands, which can reduce hand sweating and prevent **.

Why do your hands "wrinkle" after soaking in water for a long time? The answer is not as simple as you think!

Because the hands are soaked in the water for too long, the water enters the person's ** and begins to turn white, so soak in the water less when swimming to avoid this symptom.

Cells lose too much water, of course, this part of the water is free water, it will not have any effect, and it will be replenished by itself after a while. When soaked in water, because of the difference in the concentration of tissue cells and water, free substances will naturally flow out of the cells with high concentrations, which will show whitishness and wrinkles for a long time.

Normal**Layer of oily substance protection on the surface** Moisturizing Soaking in water for a long time leads to the loss of oily substances Can not retain water but dehydrate.

So the fingers are crumpled.

People who have studied biological cytology know that when there is a concentration difference between the inside and outside of the cell, some ions will move from the low concentration to the high concentration, and when your hands are soaked in water for a long time, the water molecules will enter your ** cells, because only the outer ** cells absorb water, and at the same time are pulled by the inner cells, and the external manifestations are finger wrinkles.

Because the concentration of fluid in the body is higher than that of fresh water, when the hands are soaked in fresh water for a period of time, the water will flow into the epidermal cells, and the cells will swell and deform.

On the contrary, since the concentration of fluid in the body is lower than that of seawater, when we swim in the sea, water flows out of the epidermal cells, and the cells shrink and deform.

At the same time, there is a bundle of elastic proteins at the bottom of the epidermal cells that are closely linked, and after the cells change, the protein shrinks or swells unevenly, and wrinkles will also occur.

Because the hand is soaked in laundry detergent water or soapy water, the concentration of cell fluid in the cells on the hand is lower than the concentration of the laundry detergent or soap liquid, and the cells lose water and shrink, so the hand will wrinkle.