Using sunscreen is essential to protect and prevent UVA and UVB rays from penetrating the skin. The sun filters included in sunscreen create a barrier on the skin that protects it from irritation, burns, allergies and redness. For sunscreen with maximum effectiveness, it must be applied in appropriate quantities and spread evenly over the entire surface of the skin, applying it every 2 hours, after bathing or sweating. It is also important to avoid exposure to the sun in the middle of the day (from noon to 16:00) and it is advisable to use dietary supplements to boost sunscreen. Using aftersun is also advisable so that the skin recovers moisture and maintains its natural antioxidants. If you are taking photosensitising medication or have a skin condition, it is particularly important to follow these recommendations. If you develop blisters, fever, or a headache after sun exposure, consult your doctor.