{"id":15683,"date":"2026-09-03T06:56:27","date_gmt":"2026-09-03T06:56:27","guid":{"rendered":"https:\/\/skinexpert.sesderma.com\/por-que-aparecen-manchas-verano-aunque-uses-protector-solar\/"},"modified":"2026-09-03T07:13:56","modified_gmt":"2026-09-03T07:13:56","slug":"why-do-more-spots-appear-in-the-summer-even-if-you-use-sunscreen","status":"publish","type":"post","link":"https:\/\/skinexpert.sesderma.com\/en\/why-do-more-spots-appear-in-the-summer-even-if-you-use-sunscreen\/","title":{"rendered":"Why do more spots appear in the summer even if you use sunscreen?"},"content":{"rendered":"

You apply SPF 50 sunscreen every morning, you haven\u2019t gotten sunburned a single day, and yet, in the middle of summer, your skin tone looks more uneven and your spots are more pronounced. It\u2019s not just your imagination. Freckles can darken with sun exposure, some spots may repigment, and others are a common sign of cumulative sun damage<\/strong>. The explanation isn\u2019t that your sunscreen is defective, but rather that you assume applying this type of product is enough\u2014regardless of how, when, or how much you use it\u2014and that you overlook other essential sun protection measures.<\/p>\n

Five reasons why you still get sunspots even when you use sunscreen<\/h2>\n

1. You\u2019re Not Applying Enough<\/h3>\n

One of the most common mistakes is using less sunscreen than necessary, which significantly reduces its effectiveness. To achieve the SPF indicated on the label, studies use an application rate of 2 mg\/cm\u00b2 of skin.<\/p>\n

As a practical guide to approximating this amount, the \u201ctwo-finger rule<\/strong>\u201d is recommended. For example, two lines of product spread across two fingers for the face and neck. This is likely quite a bit more than most people usually use, and it\u2019s what really makes a difference.<\/p>\n

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2. You\u2019re not reapplying correctly<\/h3>\n

During prolonged sun exposure, the amount of sunscreen on your skin can decrease over time, so it\u2019s necessary to reapply it approximately every two hours while you\u2019re out in the sun\u2014and especially after sweating, swimming, or drying off with a towel.<\/strong> Many people apply it only once a day, which leaves their skin unprotected for much of their time in the sun.<\/p>\n

3. No sunscreen blocks all radiation<\/h3>\n

No sunscreen can block 100% of solar radiation<\/strong>; a small amount of radiation always reaches the skin, so it\u2019s still possible to tan.<\/p>\n

That\u2019s why it\u2019s important to supplement the use of sunscreen with other sun protection measures, such as wearing protective clothing, a hat, and sunglasses, or seeking shade\u2014especially during the middle of the day.<\/p>\n

In addition, it\u2019s important to understand the meaning of the symbols on your sunscreen. The SPF<\/strong> indicates that your product protects against UVB<\/strong> radiation; however, for protection against UVA<\/strong> radiation, you need to look for this symbol inside a circle.<\/p>\n

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4. Visible light can have an effect<\/h3>\n

Visible light is the only light your eyes can see, and it is present throughout the day. In people with higher skin phototypes, exposure to blue light in particular can promote the development of hyperpigmentation by triggering melanin synthesis.<\/p>\n

5. Melanocytes may become overactive<\/h3>\n

Melanocytes are the cells responsible for producing melanin and can be activated by sun exposure. In some cases, when this exposure becomes constant, melanocytes may remain overactive and steadily increase melanin production, promoting the appearance of spots.<\/p>\n\n\n\n\n\n\n
Type of radiation <\/strong><\/td>\nRelationship to pigmentation<\/strong><\/td>\nImpact on the skin<\/strong><\/td>\n<\/tr>\n
UVB<\/td>\nStimulates melanin production<\/td>\nDelayed tanning and sunburn<\/td>\n<\/tr>\n
UVA<\/td>\nOxidation and redistribution of melanin<\/td>\nImmediate tanning and photoaging<\/td>\n<\/tr>\n
Visible light<\/td>\nStimulates melanin production<\/td>\nAppearance of spots in higher phototypes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

How to prevent dark spots from getting darker in the summer<\/h2>\n