The sun – our greatest ally and simultaneously our skin's greatest enemy. While sunlight energizes, improves mood, and provides vitamin D, too much of it can lead to permanent skin damage. Sun spots, also known as sun discoloration, are one of the most visible signs of overexposure to UV radiation. What causes them, and why is it important to understand them to effectively prevent them?
Skin pigmentation disorders
Skin pigmentation disorders, commonly known as hyperpigmentation, are a condition characterized by an abnormal accumulation of melanin—a natural pigment produced by melanocytes. Melanin is an essential protective element in the skin, protecting it from the harmful effects of UV radiation. However, its overproduction or abnormal distribution can lead to pigmentation changes, which take various forms, such as lentigines, melasma or post-inflammatory hyperpigmentation (Matysek-Nawrocka, 2023; Michalak, 2021). Learn more: Skin pigmentation disorders – what are they and how do they occur?
Red spots on the face – how to get rid of them?
For many people, red spots on the face aren't just a matter of aesthetics, but also a signal that something disturbing is happening within the body. Whether it's an allergic reaction, a symptom of rosacea, or a skin irritation, each redness has its own cause and requires an individualized approach. Learn what can cause red spots, how to treat them, and what steps to take to enjoy a healthy, even complexion: Red spots on the face – how to get rid of them?
1. Excessive exposure to UV radiation
Ultraviolet (UV) radiation is the most important factor causing sun damage. It is divided into two main types:
- UVA: penetrates into the deeper layers of the skin (dermis), accelerates photoaging processes, destroys collagen and elastin fibers, which leads to loss of firmness and visible pigmentation changes.
- UVB: acts on the skin surface (epidermis), causes sunburn and stimulates melanocytes (pigment cells) to produce melanin.
Melanin, the natural pigment responsible for skin, hair, and eye color, serves a protective function by shielding cellular DNA from UV damage. However, with excessive sun exposure, melanocytes produce melanin unevenly, leading to the formation of darker patches on the skin. These changes most often appear on exposed areas of the body, such as the face, arms, hands, and décolleté.
Prolonged and frequent exposure to UV radiation, especially without adequate protection, causes cumulative damage to the skin. Furthermore, UV radiation affects skin stem cells, reducing their ability to regenerate, which increases the risk of permanent discoloration.
Groups particularly vulnerable to sun discoloration:
- People working outdoors (farmers, construction workers, athletes).
- People spending time in the sun during peak hours (10:00–16:00).
- People with fair skin (Fitzpatrick phototypes I and II), who naturally have less melanin, are more susceptible to UV damage.
How to prevent discoloration caused by UV?
To minimize the risk of discoloration, it is worth:
- Use creams with high SPF (minimum 30+, preferably 50+), which should be applied every 2-3 hours.
- Avoid the sun during peak hours.
- Protect your skin with clothing, wide-brimmed hats and UV-blocking sunglasses.
- Regularly use cosmetics containing antioxidants, such as vitamins C and E, which help protect the skin from oxidative stress caused by UV radiation. Our serum from the Line Regime It combines an advanced form of vitamin C with natural extracts and oils to provide skin with everything it needs for a radiant appearance. A vitamin C derivative is used in 10 %, guaranteeing effectiveness. This concentrated power of ingredients reduces the negative effects of free radicals, protects against discoloration, and moisturizes the skin – check it out: Serum with vitamin C and E
2. Photosensitizers – the influence of drugs and chemicals
Certain medications, cosmetics, and chemicals can increase skin sensitivity to UV radiation, leading to the development of so-called photosensitized hyperpigmentation. This phenomenon, called photosensitization, results from a chemical reaction between the active ingredients in these substances and UV radiation.
Examples of drugs that cause photosensitivity include:
- Tetracycline antibiotics – often used to treat acne.
- Amitriptyline and imipramine – antidepressants.
- Retinoids – used in the treatment of acne and discoloration, which may sensitize the skin to UV radiation.
Chemicals in cosmetics, such as citrus oils (e.g., bergamot oil), can also lead to photosensitivity.
How to prevent photosensitized discoloration?
- Read medication leaflets and avoid the sun if you are taking photosensitizing medications.
- Use creams with high SPF and protective clothing.
- Avoid cosmetics containing photosensitizing ingredients before sun exposure.
3. Genetic predisposition
Genetics plays a key role in susceptibility to sun damage. People with fair skin (Fitzpatrick phototypes I and II) are particularly susceptible to UV damage because their skin contains less melanin, which naturally protects against the sun.
Moreover, in people with genetic predisposition, melanocytes may function more actively, leading to uneven melanin production and faster development of pigmentation spots.
4. The skin aging process
With age, skin regenerative processes slow down and melanocytes function less precisely, leading to uneven melanin distribution. This results in the appearance of age spots or lentigo senile, a form of sun-induced discoloration.
Repeated exposure to UV radiation over the years causes cumulative damage to the skin. This damage is visible as:
- Spots of irregular shape and darker color.
- Reduced skin elasticity, which increases the visibility of discolorations.
5. Lack of adequate sun protection
Lack of regular use sunscreen creams This is one of the most important skincare mistakes that leads to discoloration. UV radiation penetrates through clouds and windows, so sun protection should be used daily, not just when sunbathing.
Why is SPF protection crucial?
- Protects against the formation of new discolorations.
- Reduces the risk of photoaging and the development of skin cancer.
- Supports skin regeneration processes by reducing oxidative stress.
How to use sunscreen?
- Apply sunscreen 15–30 minutes before sun exposure.
- Reapply it every 2-3 hours, especially after swimming or heavy sweating.
Why is it worth protecting your skin against sun discoloration?
Sun spots are a stark reminder of the importance of daily sun protection and conscious skincare. UV radiation, genetic predisposition, aging, and poor skincare habits can all lead to pigmentation changes that become increasingly difficult to remove over time. Taking care of your skin isn't just about aesthetics, but also about your health. Remember that proper prevention and sun protection are the best way to maintain radiant and healthy skin for years to come.
Footnotes:
- Barszcz, W. and Wojciechowska, K. (2022). The use of bee products in cosmetology and dermatology. Aesthetic Cosmetology and Medicine, 11(4), 147-152. https://doi.org/10.52336/acm.2022.022
- Fatima, R., Arif, T., & Sami, M. (2020). Diet-induced carotenoderma – a rare clinical presentation. Dermatology Review, 107(5), 481-483. https://doi.org/10.5114/dr.2020.101678
- Pyka, A. (2019). Fumaric and maleic acids – separation and detection by np-tlc technique in connection with densitometry. Farmacja Polska, 75(9), 475-480. https://doi.org/10.32383/farmpol/116059
- Salińska, M., Kowalska, H., Torzecka, J., Waszczykowska, E., & Woźniacka, A. (2019). Phototoxic reaction due to solar radiation exposure in a psoriatic patient treated with PUVA therapy. Medycyna Pracy, 70(6), 763-768. https://doi.org/10.13075/mp.5893.00881
