please i seek your advice

im a girl 23 years old n i live in egypt
i have tanned skin (not so dark)when im exposed to the sun discolouration happens some parts of my face becomes darker than other parts ..doctors advised to put sun block with spf 100 i tried many kinds from Photoderm to Spectraban to Dove but these types made pores  appear in my face
Olay with spf 15 is good to me but is spf 15 enough to avoid me from the sun in summer time ?

[pangolin]

Egyptian sun is very strong and I don't think spf 15 is really enough. If you have them in Egypt I would try Avene or Dr.Hauschka or Lancaster. I have sensitive skin and I only use these ones.

[NeuroWoman]

Using SPF 15 will ensure that you age prematurely. It's also bad for the health of your skin.

'Not so dark' means 'not so much melanin' and 'not so much natural protection' from the sun. Protect your health and your beauty.

Use SPF 15 now and you will regret it. I understand not liking the appearance of pores - I hate that too - but you are setting yourself up for much worse troubles.

Pangolin has some god suggestions. Also, look up Paula Begoun. She has good books about skin care products, evaluates different lines, has a website, and a free email newsletter.