I feel like I should have applied sunscreen properly a long time ago.

When I was young, I thought it wouldn't be a big deal even if I applied sunscreen carelessly, but looking at the blemishes on my face these days, I really regret it.

The pigmentation on the cheekbones looks more prominent, perhaps because they receive a lot of sunlight.

I am trying to apply it meticulously every day now, but the freckles and blemishes that have already formed aren't disappearing easily. Has anyone managed to prevent their pigmentation from getting darker after changing their sunscreen habits?