1, how to choose various materials?
At present, the materials for making underwear can be divided into natural materials and artificial materials. Natural fabrics are mainly silk, cotton, hemp and so on. Among them, silk is soft to the touch, good in dyeing effect, pure in color, warm in winter and cool in summer, and strong in sweat absorption and permeability, so it is a good material for making underwear.
Man-made materials can be divided into two categories: nylon and polyester yarns. Professor Li said that although this kind of underwear made of chemical fiber is durable and easy to wash, its hygroscopicity is poor, which is not conducive to the absorption and distribution of sweat. It often feels sultry when worn, which is easy to cause skin damage. Caprolactam, a chemical residue of nylon, can cause dry and rough skin, even chapped skin and dermatitis.
2. Five rules of wearing underwear
According to the report of American Health website, Life Times summarized five rules to follow when wearing underwear.
1 material is breathable.
Tight underwear is not only uncomfortable to wear, but also affects air circulation. Therefore, the key to choosing a suitable underwear is to choose the right material. Melissa, a gynecologist at Ohio State University Wechs Medical Center? Gist thinks that cotton underwear has the best performance because it has the best air permeability. Synthetic fibers can "lock in" moisture, which may cause itchy skin.
Do not use washing powder containing bleaching ingredients.
Melissa, a dermatologist at Cleveland Clinic, USA? Pierre suggested that when cleaning underwear, low-sensitivity laundry detergent should be used to reduce the irritation to the skin. At the same time, avoid using washing powder containing bleaching ingredients. Bleaching ingredients will not only destroy fabric fibers, but also make underwear wear faster and cause skin allergic reactions.
Change clothes every day.
Dr. Gist pointed out that besides changing underwear every day, you should also avoid sitting in wet places for a long time, especially after exercise, and change underwear in time, otherwise it is easy to get infected with yeast, leading to skin allergies and infections.
4 change if you lose elasticity.
Pierre pointed out that underwear also has a "shelf life". Once it loses its elasticity, it will cause extra friction and shaking. It's time for a new pair of underwear.
Pay attention to the stains on underwear.
Secretions on underwear can show a lot of health information. Dr. Gist reminded that if women find white or beige secretions on their underwear, it is not a big problem. Once the secretion stinks or is bloody, you should seek medical advice promptly.
3. Precautions for wearing underwear in summer and autumn
First of all, it depends on whether it absorbs sweat and breathes. It is hot in summer and autumn, so when choosing underwear, it is best to choose thin products of natural fibers as fabrics. Underwear with corrective function is mostly made of chemical fiber, which has poor sweat absorption, especially thick underwear with padding like magic bra, which will hinder the evaporation of human sweat. If you want to modify your figure, blended high-elastic underwear without hard materials and fillers is a better choice.
Secondly, choose transparent and light-colored ones. In case of the embarrassing scene of "underwear exposure". If you wear a T-shirt, you'd better choose a smooth surface, and don't wear a lot of lace to avoid this bump. When wearing sleeveless low-necked clothes, it is better to wear strapless underwear and underwear to prevent the shoulder straps from slipping. It is best to wear pure white underwear less, because fluorescent whitening agent is often added to the fabric, which is a carcinogen and will pollute the water source with washing.
Finally, it is best to keep abreast of the latest body shape. The human body is in a state of constant change, not only with age, but also with other factors such as seasons. Professor Li suggested that people's bodies would swell slightly in summer compared with other seasons. When women buy underwear, it is best to re-measure the size and grasp the change of body shape in time.
4. Underwear is best washed by hand.
How to wash underwear is safe and hygienic? Experts also gave many suggestions:
1 Wash by hand as much as possible.
The inner wall of the drain in the washing machine is often covered with cloth scraps and dirt, thus breeding bacteria, which will inevitably contaminate underwear during washing; Most detergents used in dry cleaning are tetrachloroethylene, which is also harmful to human health.
2 separate washing
Even if it is washed with a washing machine, the ones that should be separated must be separated. Everyone's clothes had better be washed separately, at least for children and adults. The clothes of healthy people and patients are separated; Underwear and coat are separate.
3 exposure after cleaning
After washing clothes, let the clothes be fully exposed in a ventilated, dry and sunny place. It is very important that bacteria can hardly survive above 55 degrees Celsius.
Clean the washing machine regularly.
The longer the washing machine is used, the more frequently it is washed, and the more mold spores are hidden in the washing tank, and then attach to clothes, causing diseases such as allergies. When cleaning, it is best to use a special cleaner or "baking soda and white vinegar" for cleaning.
5. The harm of women wearing wrong underwear
1. The "culprit" of mammary gland hyperplasia
It is understood that most breast diseases are caused by inappropriate bras, because there are many rich blood vessels and lymphatic nerves on the breast, whose function is to provide breast nutrition and metabolism. However, if the bra is too small, it will affect blood circulation and supply and cause breast ischemia and spasm, which will eventually lead to breast hyperplasia. The cause of breast hyperplasia turned out to be a bra, which may make many women unbelievable, but the fact makes you speechless.
2. Lead to breast cancer
Studies have shown that sleeping with a bra often leads to breast cancer. The researchers surveyed more than 4,700 women for two and a half years, and found that those who wear bras for more than 12 hours a day are 2 1 times more likely to develop breast cancer than those who wear them for a short time. If you wear it even when you sleep, the number will jump to 1 13 times. According to the research report, the incidence of breast cancer in the United States is increasing year by year, which is related to the popularity of bras.
3. Threatening cervical vertebrae
Nowadays, there are many styles of bras, but it is these various styles that make women threatened by cervical spondylosis prematurely. In particular, the thin shoulder straps of some bras will cause premature aging of the muscles of the shoulders and back of the human body to varying degrees. This symptom is not only related to the thin belt of the bra, but also related to the small size of the bra. A bra that is too small is like putting a thin wire on the skin. When the human body carries out a series of activities, the bra frequently rubs in a small area of the skin, and these muscles will be overtired and aging will occur over time.
Press the chest
A large number of women will buy some tight underwear for beauty, because it can make them look big and cleavage is deep. However, the main reason for this effect is extrusion. In the long run, it is easy to cause oppression on the chest, leading to chest tightness and shortness of breath, which seriously affects cardiopulmonary function.
5. It's easy to sag.
Usually, our underwear just covers the chest and is not affected by gravity. But we found that as long as we lift the master to get something, or reach the tie rod on the bus, our underwear will run up. In order to prevent it from running, we simply relax the shoulder strap, and underwear will not support the breast at this time. Therefore, a sagging chest will be formed over time, so the fuller the chest, the easier it is to sag.