I'm over 30 years old now, but still have big acnes especially before getting period. Have tried so many acne medication, they seem to work at the beginning, but then after a while they stop to work. Any suggestions?

A lot of people have adult acne, I have it too. It's such a pain, isn't it?
Have you visited your doctor? He/she may put you on anti biotics.

In the mean time, try visiting Acne.org - Acne treatment and community (http://www.acne.org) This site is here for acne sufferers. They don't promote products there, it's just good advise.

Good luck!

I use Tea Tree Oil Blemish stick. You can buy it at the body shop. Works great and prevents scarring.