Founder of Dermlogica and The International Dermal Institute, Jane Wuwand, answered some burning skin questions for us.

So, if you're wondering why pimples are still plaguing you or why your 'expression' lines are getting worse, read on…

Q: I'm spending far more on my facial skincare than on my body? How can I even the balance?

A: "I support the focus of care on the face, because the face is exposed to the elements every day of the year. One of the ways to gauge the amount of extrinsic UV damage you've endured is to look at the skin under your arm, or on the inside of your thigh. Then look at your forehead. By the time a person is even 25 or 30 years old, there is usually a marked difference. Of course we need to nurture every inch of our skin, but it makes sense to me that the face is the focus. However, a good body exfoliant and body-hydrating cream is a great, simple step before and after your bath or shower. And, of course, total body protection from UV when we are stripped down for beach, sports or other sun exposure."

Q: Is there any way to tell if those little lines around my eyes are simply dehydration lines or the start of aging wrinkles?

A: Sorry, but those little lines around your eyes are most likely signs of extrinsic aging. If it's actually mere dehydration (perhaps the aftermath of a long night or long flight) they'll be gone after a nice big salad, a gel-based eye serum, a glass of water, maybe an ice-pack on the forehead and a nap. Otherwise, they are signals of cross-linking in the collagen and elastin, which occurs as the result of free radical damage. This cross-linking essentially causes clumping or bunching of these support substances, which normally form a springy, resilient net or web in young, undamaged skin. This cross-linking becomes more severe with dehydration, but the damage is sub-cellular. The architectural structure of the skin's composition has been affected by UV, smoking, and other free radicals.

Q: I'm nearly 30 but still struggling with breakouts now and then. What's your best skincare advice?

A: "I think the sharp rise in adult acne is an indicator of something larger going on in our culture. The best tip I've heard is that adults shouldn't borrow OTC acne products from their kids. Acne is complex, and interacts with many factors in the body and environment. Simply put, adult acne requires treatment created specifically for adults. For one thing, teen skin repairs itself and heals much faster than older skin, so adult formulas have to be more gentle. And yet, adult skin is more prone to permanent or at least long-lasting reddening and scarring, so it's really important to arrest the inflammation cycle as early as possible with older acne clients. Of course, we want to stop inflammation in teen skin too, but young skin can recover more quickly and thoroughly."