WELLNESS WEDNESDAY: Why it is important to use sunscreen all through winter

A common misconception is that sun protection should only be used in summer. Skin cancer is one of the most common types of cancers and anyone exposed to the sun’s harmful UVA and UVB rays is at risk – even in winter.

The Skin Cancer Foundation explains that sunlight contains a spectrum of wavelengths, including visible and invisible light. Ultraviolet (UV) light forms part of the invisible spectrum, of which long-wave ultraviolet A (UVA) and short wave ultraviolet B (UVB) reach the earth’s surface.

UVA forms the majority of UV light and contributes to skin aging and the development of skin cancer, as it penetrates deeper into the skin. It has a consistent intensity throughout the day, all year round, and can penetrate both cloud and glass. 

Dr. Jonita van der Walt, a referring dermatologist for Mediclinic Bloemfontein, therefore advises that it’s important to use sunscreen even when you are driving.  UVB light is more intense and leads to redness and sunburn which indicates some degree of DNA damage, which can potentially lead to genetic mutations.

– Photo by The Creative Exchange on Unsplash

Did you know? UV light reduces the immunity in your skin and explains why, for example, some people are prone to getting cold sores on sunburnt areas.

Winter sun: During winter you should still protect your skin from the sun. Clouds don’t stop the penetration of UV light, specifically UVA light. You can get sunburnt on those breezy ‘bright’ days when it doesn’t feel too warm, but if the UV index is high, you’re putting yourself in danger of skin damage.

Slap it on
: Tempted to dig out the old bottle of sunscreen you used last summer? Don’t. Sun protection products have an expiry date, as they lose protection factor after six months, so check the date on the packaging.

How you store your sunblock is also important – if the bottle is exposed to the sun, it will expire quicker. Dr. Van der Walt says your sunscreen has definitely expired if it has separated or crystallized, in which case discard it and get new sunscreen. ‘Make sure your sunblock has a high SPF (30+) and covers for both UVA and UVB,’ she adds.


Moles See a doctor if you’re prone to moles, have new or changing moles, or if you notice a scab or sore that crusts, bleeds, and won’t heal in four weeks.
Skin screen Book an annual skin screening – but go more frequently if you have a higher risk of skin cancer, or had even one bad sun exposure in your life.
Dry skin Our skin tends to become dryer in winter, especially in areas with a cold, dry climate; and also gets drier as we age. Regularly apply an extra-moisturizing cream, especially if you have a tendency to develop eczema.

Use plain emollients without colorants/fragrances liberally. Emollients with an oil base will moisturize more than water-based ones. For very dry skin a moisturizer that contains urea or lactic acid may be helpful.

Be careful not to use too much soap, especially anti-bacterial soaps or cleansers that contain alcohol, which dries out your skin even more. You can also use an emollient as a soap substitute.

Skin becomes dry when it loses too much water or oil. Anyone can get dry skin, although some people are more prone to it – and environmental or hereditary factors also play a role.  Extremely dry skin can be a warning sign of dermatitis. If you develop a skin rash that does not heal with home-based treatments, consult your doctor or a dermatologist.

First published by of Mediclinic