How does sunscreen work, and what do SPF and Star classifications mean?

The temperatures are to be much higher than the average in many parts of the United Kingdom, and ultraviolet levels are expected to be high.

How can you protect your skin from sunlight and what should you do if you are burned?

The most prominent number of sunscreen is sun protection factor or SPF.

The higher the number, the greater the protection it provides.

SPF tells you the amount of protection provided by the sunscreen from UVB radiation. The number indicates the amount of UVB it allows, not the amount of its mass.

For example, sunscreen with SPF 15 Fiftenth allows sunlight to reach your skin, or about 7 %.

So it filters about 93 % of UVB rays while SPF 30 filters about 97 %.

This means that if you can stay in the sun for 10 minutes without protection without burning, the theory SPF 15 gives you 15 times that protection, or two and a half hours before you burn.

The British Association of Dermatologists says that sunscreen with SPF 30 is “a satisfactory form of sun protection as well as shade and protective clothes.”

She says sunscreen should be re -applied at least every two hours, regardless of SPF.

Many brands also carry a stars classification from one to five.

This tells you the percentage of UVA radiation, which is absorbed by sunscreen compared to UVB absorption. The more stars, the better.

UVA and UVB indicate different wavelengths of radiation from the sun that enter the atmosphere of the Earth.

UVA It is associated with aging of skin and pigmentation as well as skin cancer. It can affect human skin even through glass.

UVB It causes sunburn, associated with certain types of skin cancer – basal cell cancer (the most common type) and malignant skin cancer.

A low -class SPF rays can be high -class stars if UVA to UVB protection is the same in SPF higher.

Ideally, you want a sunscreen with high SPF and high stars classification.

These levels of protection assume that sunscreen has been applied in ideal conditions.

In fact, most people do not completely apply sunscreen, and can be rubbed with sweat or while in water.

Experts believe that most people apply only half the recommended amount.

A sunscreen that exceeds the expiration date should not be used as it may be less effective.

The European Union’s guidelines state that sunscreen must be marketed only that it has the protection of sunlight for “50+” and not 80 or 100 assessments that can be found in some countries.

He believes that this may be misleading about the additional amount of protection they provide: SPF 50 provides protection about 98 %, while SPF 100 will provide less than 100 %.

There is no product that provides 100 % protection from the sun, so the advice is that everyone should cover up and seek to search for a shadow when the sun is stronger.

There is a lot of sunscreen “extended corrosion” in the market that announces themselves for use “once a day”. Many claim that they provide protection for up to eight hours – if applied properly.

But some dermatologists recommend that these products should still be applied at least every two hours, such as any sunscreen, since the risks that may have missed a place – or they will rub or wash at that time – are very high.

any? In 2016, a report criticized four of these products for not providing promised protection. And I found that after six to eight hours, the average protection provided by 74 % decreased.

However, this claim was rejected by some manufacturers, who said that their tests had produced various results.

Sunburn is produced in hot skin and pain that may peel off a few days later. In maximum cases, the skin can be pulp.

It usually improves within a week or so, but there are things you can do to relieve symptoms.

the NHS recommends Exit the sun as soon as possible, and keeping the burning skin is covered to protect it from the sun until it completely heals.

A cold shower or a wet towel can help, as AFtersun products, pain relievers and drinking a lot of water can also moisturize. Ask your pharmacy advice.

You should not apply petroleum gel or ice on the burned skin. You should resist the scratching of the burning areas and avoid tight clothes.

Call GP or NHS 111 if your skin is added or swollen or you have other symptoms of heat exhausting or heat blow.

Obtaining sunburn can regularly increase the risk of skin cancer.