What are serums all about?

[Elfina]

Do they make any difference?

I'm 31, and was quite shocked at a photo of myself yesterday. I have oily-ish skin, that often looks congested.

I've not got loads to spend, but I'm trying to do something to fight the wrinkles!

I'd suggest Effaclar Duo for congestion.

The superdrug clearly youthful overnight serum is really nice and about £4 :)

An acid toner might help too - one with glycolic acid (eg First Aid Beauty pads). Have a read of Caroline Hirons blog

You probably want to re-examine all of your whole skincare products. If it's looking congested it might be because you're using products designed for teenaged skin and they're too much for your now drier adult skin. I switched to hot cloth cleansing with an oil based cleanser in my 30s and it made a massive difference to my skin.