Singapore Expats

My face have some mark/spot after I pop my pimple,whitehead. The mark/spot have been left on my face for quite long and it doesn't seem to be fading away. I need some help/advise from people out there. Or if anyone know where can i consult a doctor for my face. I'm pretty poor, so ya
Or maybe anyone can intro me some products that i can use.

Clinic doctor will recommend NEoStrata, etc.

I use Avene.

You can use something like Differin for black heads and white heads control. Its quite heavy and you need a prescription to buy it from Singapore pharmacy.