hair health, scalp, sun, heat, hair growth Excessive sun exposure can cause dryness and irritation on this sensitive scalp skin, image: Pexels
When it comes to caring for one’s skin, most people are well aware of the need for sunscreen and protective clothing. Yet, many neglect a crucial area that is often exposed to the elements: the scalp. Excessive sun exposure can cause dryness and irritation on this sensitive skin, affecting the health and growth of hair follicles over time.
According to Dr Kashmal Kalan, Medical Director of Alvi Armani South Africa, safeguarding the scalp from the sun should be a key component of anyone’s overall hair care strategy, especially now during the sunny December holiday period.
“The scalp is a unique area of skin. It’s highly sensitive due to its rich network of blood vessels and hair follicles. As a result, prolonged exposure to UV rays can create a hostile environment for hair follicles, and while mild sun exposure is normal and even beneficial for things such as vitamin D synthesis, unchecked and repeated sun damage can accelerate existing hair loss conditions.
“It’s easy to assume that hair automatically protects the scalp, but if you have thinning areas or if your hair is naturally fine, the underlying scalp is not as shielded as you might think. Over time, sun damage can dry out the scalp, create inflammation, and potentially speed up certain forms of hair loss.”
While the sun’s UV rays primarily impact the outer layers of the skin, these harmful effects can extend deeper, affecting the structures that nurture hair. Continuous exposure can contribute to dryness, inflammation, and free radical formation. Over the years, these subtle injuries can accumulate, especially in individuals already dealing with a genetic predisposition to conditions like androgenetic alopecia, also known as male and female pattern baldness.
In severe cases, such as intense sunburns on the scalp, the skin may even blister or peel, also damaging hair follicles. So, although the sun alone is unlikely to cause permanent hair loss without significant burning, it can exacerbate pre-existing conditions, making hair thinning more pronounced.
Sun intensity varies throughout the day and changes with the seasons. What might be safe around 5pm as the sun sets could be harmful at noon when the sun is directly overhead.
“If the sun is at its peak and you’re feeling that unmistakable heat on your scalp, it’s time to think about protection. Even an hour of strong midday sun can be problematic for those with sensitive scalps or thinning hair. But, if you’re quickly heading to the mall, for example, and know you won’t be in the sun for too long, there’s probably nothing to be concerned about,” notes Dr Kalan.
“In contrast, if you plan on spending hours outdoors at the beach, or in the pool, at a braai, or hiking, especially during peak summer months, take your scalp protection as seriously as you do your skin and eyes. Prevention is always better than treatment.”
Fortunately, protecting the scalp doesn’t have to mean avoiding the outdoors altogether. He emphasises common-sense measures as the first line of defence, where wearing a hat is one of the simplest and most effective protective methods. However, not all hats offer equal protection. A hat should fit comfortably, and ideally be made from a breathable, light-reflecting material.
“If you prefer not to wear hats or find yourself in a situation where a hat may not be practical, a water-resistant, scalp-friendly sunscreen can also offer protection. When applying sunscreen to yourself or your children’s bodies and faces this December, remember to work it into the scalp as well.”
For those who have recently undergone a hair transplant or other hair restoration treatment, scalp protection is all the more critical. In the first four to six weeks after a transplant, the healing tissue is extremely delicate. Significant sun exposure during this period can interfere with proper healing, potentially leading to scarring or poor graft survival. Patients need to take extra precautions during these times.
“Even after the initial healing phase, newly transplanted follicles remain sensitive for some time. Minimising exposure and protecting the scalp ensures that the implants can take root and thrive. We want to create the ideal environment for the transplanted graphs to take and grow, as giving them a healthy, protected space will ensure better long-term results.
“So, by acknowledging the role sun exposure plays in damaging hair follicles and accelerating hair loss, people can take proactive steps to preserve their scalp health. Whether through smart clothing choices, applying specialised protective creams or powders, or simply being aware of peak UV hours, these measures are simple yet powerful,” concludes Dr Kalan.
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