Q: I am in my mid-40s but I still have very oily skin with blemishes despite a diligent skincare regimen.

While there are many skincare products that cater to such problems, my concern is whether they should be used only for younger skin - like that of teenagers who tend to have acne problems during puberty. Are they also suitable for treating adult pimples?

I also have pigmentation problems - some brown spots on the cheeks.

I have been using a below SPF20 sunblock on top of my foundation and make-up powder. Today, most make-up products come with sunscreen protection.

Does applying an additional sunblock result in clogged pores and oily skin?

A: Yes, these products may be used for adult skin with pimples. However, if you still suffer from acne breakouts despite the use of over-the-counter skincare products, you should consult a dermatologist for prescription-strength anti-acne creams which are more effective.

An example would be a topical retinoid, which is useful for controlling excessive oil production.

As for your query on sunblock application, I would recommend applying an additional sunblock if your make-up product does not provide sufficient broad-spectrum sun protection against both UVB and UVA rays, and if you are spending more time out in the sun.

The SPF relates only to protection against UVB, but both UVB and UVA are damaging to skin. The label has to say there is UVA protection as well.

If using a sunblock, choose one that is formulated for oily skin. It should not clog pores as it has a non-greasy texture. You may have to try a few brands before you find one that best suits your skin type. Also, cleanse your face thoroughly at the end of the day to remove all traces of sunscreen.

Dr Chris Foo

Dr Chris Foo is a specialist in dermatologist at Raffles Hospital.

This article was first published in Mind Your Body, The Straits Times.