70% of seafarers always have their lips “naked”, while this is an area prone to melanoma. Remember to use sunscreen to protect your lips.

>>> Interesting secrets about sunscreen

What is SPF?
SPF is an indicator of the ability to protect the skin from UVB rays. To calculate the SPF, manufacturers must test the skin with sunscreen and without sunscreen, see how long the skin is red.

Note, SPF and sunscreen protection do not increase linearly with each other. For example, SPF 30 does not provide double the protection of SPF 15. The difference is that SPF 15 protects the skin from 93% UVB and the SPF 30 protects the skin from 97% radiation.

Applying sunscreen is a therapy to keep the skin young and healthy. It can become your daily routine. If you are using sunscreen, read carefully what you need to know below:

There is a difference between sunblock and suncreen
These terms are often used interchangeably, but in reality they have differences:

Sunblock is a product line that prevents UV rays from being absorbed into the skin by zinc oxide or titanium oxide. These substances are not absorbed into the skin because they are only on the surface of the skin. Therefore, to fully utilize the sunblock, you must apply a layer evenly, without leaving a place. Pros: Durable grip, does not penetrate the skin so it heals for the skin. However, because you have to apply a thick layer, the face skin is easily greasy and shiny.

Suncreen is a product line with UV absorbing substances to neutralize its harmful effects. Pros: Does not create a white film on the skin should look more natural than sunblock. However, their performance is not stable, so you must regularly add cream after 3-4 hours. In addition, the product may cause an allergic reaction to sensitive skin.

The choice of cream is depending on the preferences of each person. When using, you should note:

Use sunblock, you should apply lotion first and then sunscreen (because sunblock is on the surface of the skin, if applied first, it will prevent the cream from promoting its use).
Use Sunscreen, you should apply sunscreen first then lotion (because sunscreen needs to soak into the skin to work).
Sunblock is often a better choice for sensitive and irritated skin from chemicals in suncreen.
Find out carefully what is on the product label you decide to choose between sunblock and suncreen.

Use both skin creams simultaneously
You often think that just using sunscreen is okay, actually not enough. Doctors recommend adding an equal amount of lotion to the sun-exposed areas on your body and face (approximately 2 tablespoons).

Usually use
If you spend most of your time outdoors, you need a plan to use sunscreen all day

The sunscreen effect of the cream lasts for about 2 hours, so it is best to reapply it every one and a half to 2 hours. Remember, not a high SPF cream will work longer, this time period applies to all sunscreens.

Do not think that sunscreen is waterproof
Conventional sunscreens do not have a waterproof function, so manufacturers are not allowed to write on their products with this feature. However, they can use the word “water resistant” to promote the exaggerated product.

Please check the labels carefully. If you use water-resistant sunscreens, you may need to reapply them after about 40 minutes.

Don’t forget to protect your lips
The lips are right in the middle of the face and they are exposed to the sun just like the rest of your body. So they also need to be protected.

According to a survey, up to 70% of seafarers always let their lips “naked”, while this is an area prone to malignant tumors. So make sure to use lip balm and sunscreen to protect your lips.

The safety of sprays
Sunscreen spray is relatively new and convenient to use. However, many people are concerned about its safety. Therefore, you should carefully study the use as well as contraindications on the package to have an appropriate choice.

Sunburn to what extent can skin cancer
The degree of sunburn depends on genetic factors and environmental factors exposed. However, the darker the skin, the less sunburn and the lower the risk of skin cancer. In contrast, fair-skinned white people are more likely to get skin cancer.

Sunscreen and impact on the ecosystem
Between 2015 and 2018, one in five coral reefs in the world died, partly because of sunscreen. In May 2018, Hawaiian lawmakers enacted a bill to ban sunscreens containing oxybenzone and octinoxate that are harmful to coral reefs on the island.

Ingredients in sunscreen are safe for health
There is plenty of evidence to show that sunscreens are safe, but science has so far not fully understood the health effects of using sunscreens for a long time.

Some studies show that para-aminobenzoic (PABA) and benzophenone sunscreens can irritate certain skin types, leading to rashes and rashes. The chemicals in sunscreens such as avobenzone, oxybenzone, octocrylene, and ecamsule are likely to enter the bloodstream but the consequences are unclear.

When to remove old sunscreen
Shelf life of sunscreen is usually three years under normal room temperature conditions. If placed in an environment that is too hot or too cold, the quality of the product will be affected, thereby disabling their function.

Sunscreen can be used on other areas of the skin
The American Academy of Dermatology recommends that the community use sunscreen on areas where it is exposed to the sun directly before going out for 15 minutes. For areas where clothing is supported, simply apply an appropriate amount to the skin. For areas of direct sunlight, reapply sunscreen every two hours.