Protection from UV starts with using enough
sunscreen - the average person only uses 25% of the recommended amount of sunscreen.  Many
things may cause sunscreen to be less effective and change the color of your
SPOT, such as:Not applying enough sunscreen initiallySwimming and towelling off remove a lot of sunscreenExercise & sweating remove sunscreenTime spent in direct sun vs time spent in the shadeYour sunscreen may be expired – check the expiry dateYour sunscreen might not be broad spectrum – check if it blocks UVA & UVB