This is what happens when the square kid grows up.
Effective Use of Sunscreen
SPF stands for ‘sun protection factor’ and this is calculated by showing how many times longer a person can be exposed to the sun compared with a person not using sunscreen. SPF 8 means you can stay in the sun eight times longer than someone without sunscreen. This is calculated for people using 2mg/cm². Most people use far less than this (about half) and therefore the effective SPF is reduced by half.
Using sunscreen with insect repellents containing DEET can decrease the SPF of the sunscreen.
Water resistant sunscreen lasts longer, but these will still need to be reapplied every two hours, especially as they can still be washed off with sweat or by swimming.
Using a broad spectrum sunscreen of SPF 15 or above, which offers UVA and UVB protection is the current guideline from NICE.
Sunscreen should be applied 30 minutes before exposure to the sun, and should be reapplied at two hourly intervals, and always after swimming or towel-drying.
After exposure to the sun creams containing aloe vera, calamine or equivalent can help to cool the skin.
Skin that has been exposed to the sun can be very dry, and so moisturising is beneficial.