We know that the ozone layer protects the Earth from harmful ultraviolet rays of the Sun. Why do we need to use sunscreen while out in the Sun
Answers
Answer:
What is SPF in a sunscreen?
SPF stands for sun protection factor. The SPF number tells you how well the product will protect you from UVB, the burning rays of the sun. (Most sunscreens also absorb ultraviolet "A" rays, or UVA.) The higher the SPF number, the greater the amount of protection. Everyone should use a sunscreen with an SPF of at least 30. If you have had a skin cancer or precancer, you should use a sunscreen with an even higher SPF. Many of the new sunscreens have SPFs of 45 or higher.
I don't burn very often. Does this mean I can use a sunscreen with a low SPF?
If you were only trying to avoid sunburn, the answer would be "yes." But protection from sunburn is not the most important reason for wearing sunscreen. You want to reduce damage from the sun. Your skin can be harmed by constant sun exposure, whether or not you see a burn. Remember, sunburn is an immediate reaction, but damage from the sun occurs over a lifetime. If you have had a skin cancer or pre-cancer, you should use an SPF of 30 or higher.
Who should use sunscreens?
Anyone who spends time outdoors should use a sunscreen. This includes:
Men, women, and children.
People who tan easily and those who don't.
Fair-skinned and dark-skinned people; people who already have tans.
People who already have tans and sunbathers, gardeners, and skiers.
Are sunscreens safe for children?
Yes. Not only are sunscreens safe for children over age 6 months, if used regularly in childhood they can prevent skin cancers from developing in later life. Recently, a researcher reported that if sunscreens were used regularly by children through the age of 18, there would be a 72% reduction in the cases of skin cancer later in life.
How should sunscreens be applied?
Sunscreens are very effective when used properly. Follow these guidelines to give yourself the most protection:
Apply the sunscreen at least 20 to 30 minutes before you go outdoors, whenever you will be exposed for 30 minutes or more.
Reapply sunscreen every 2 hours while you are outdoors, even if the product is labeled “all-day.” If you get wet or perspire heavily, reapply sunscreen more frequently.
Cover all exposed areas, including your ears, lips, face and back of your hands.
Don't skimp; apply a generous layer. Smooth it on rather than rub it in. A rule of thumb is that 45 ml (a shot glass) of sunscreen is needed to cover all exposed skin to attain the stated level of protection.
Women should apply sunscreens under makeup. If you wait to apply sunscreen until you hit the beach, you may already be perspiring, and moisture makes sunscreens less effective.
My skin is sensitive. Should I skip the sunscreen?
Some sunscreens contain ingredients that may irritate the skin. If you know you react to specific ingredients, be sure to check the contents on the label. You can also ask your dermatologist to recommend a sunscreen.
However, the sunscreen may not be causing the reaction. Other products that come into contact with your skin, including perfumes, certain medications, and soaps, may make your skin more sensitive. Think about the products you have been using (especially new products), and stop using these one by one before you stop using the sunscreen. If you are not sure about the side effects of a medication you are taking, consult with your doctor or local pharmacist.
Answer:
While out in the sun we are exposed to this harmful ultraviolet rays of the sun.
Explanation: This exposure can cause a number of harm to our body like premature ageing , skin tanning and even skin cancer. Therefore it is important to use sunscreen while out in the sun.