SKIN IN YOUR 30S AND 40S: WHAT IT’S REALLY TELLING YOU, ACCORDING TO EXPERTS
By Nicole Fuge
I never thought rosacea would be part of my story. But in my late 30s, it appeared out of nowhere; flushed cheeks, flare-ups I couldn’t explain and a whole new relationship with my skin that I hadn’t expected. A beautiful close friend of mine has been going through the same thing at the same age, which made me start to wonder: what is our skin really trying to tell us?
We often think about skin changes only in terms of wrinkles or fine lines, but the truth is that our skin is constantly evolving. It’s not just about age; it’s about hormones, lifestyle, stress and the quiet signals our bodies send us.
Why Skin Changes in Adulthood
For many women, the late 30s and 40s are a turning point and suddenly the skin we thought we knew behaves differently. Rosacea, adult acne, pigmentation and heightened sensitivity can all surface at this stage.
“This is a time of hormonal transition. Declining oestrogen, fluctuations in progesterone, and changes in how the skin responds to cortisol (our stress hormone) can make the skin more reactive. At the same time, the skin barrier naturally weakens with age, so women may experience new issues like flushing, breakouts, or irritation despite never having them earlier,” Dr Shreya Andric says.
Dr Andric, who is a Fellow of the Australasian College of Dermatologists, on the board of the Australasian Society of Cosmetic Dermatologists, and co-director and principal dermatologist at Northern Sydney Dermatology and Laser in Northbridge NSW, says rather than seeing these changes as something to fight, we can view them as a message.
“Skin is often the first place we see signs of internal imbalance. Hormonal shifts, stress, inflammation, and even subtle nutritional deficiencies can show up as breakouts, flushing, dryness, or dullness.”
The Connection Between Skin and Wellness
Multi-award-winning skin and dermal therapist Isabella Lonergan believes our outer appearance is inseparable from what’s happening inside the body.
“Stress, in particular, has a profound impact on skin, which is why psychodermatology highlights the mind-skin connection,” she says. “True skin health is rooted in a holistic approach through balanced nutrition, quality rest, and emotional wellbeing.”
Which is why skin health isn’t just about skincare products, it is about whole-body wellness … stress, poor sleep, and even gut health can show up on the face.
That breakout before a big deadline? Not a coincidence. The rosacea flare after a glass of wine or a night of little sleep? A reminder to slow down and nurture. Our skin often reacts before we consciously register what’s happening internally.
“Stress and poor sleep raise cortisol, fuelling inflammation and breakouts. Alcohol dilates blood vessels, triggering rosacea flare-ups. Diets high in sugar and processed foods spike insulin, which can worsen acne. On the other hand, consistent sleep, balanced nutrition, and stress management often show directly on the skin as fewer flares and a healthier glow,” Dr Andric says.
Listening to the Signs
Oestrogen: Supports collagen, hydration, and skin thickness. As levels drop, skin can become drier, thinner, and more prone to sensitivity.
Progesterone: Can increase oil production, sometimes leading to breakouts in midlife.
Cortisol: Chronic stress elevates cortisol, which weakens the barrier, triggers inflammation, and may worsen conditions like rosacea or acne.
As Dr Andric says, these signals aren’t flaws; they’re invitations to tune in.
“Your skin is a messenger, not just a surface issue. If it’s changing, it’s worth paying attention; whether that means adjusting your routine, managing stress, or getting a medical opinion. Don’t ignore new symptoms, but also don’t panic; most changes are very treatable with the right approach.”
Supporting Your Skin Through the Seasons
What works in your 20s might not serve your skin in your 30s, 40s, or beyond. This doesn’t mean throwing out every product you own, but rather being open to adjusting your routine and your lifestyle, as your skin evolves.
“Start with gentle, barrier-supportive skincare (non-foaming cleanser, hydrating serum, fragrance-free moisturiser). Add actives thoughtfully: niacinamide, ceramides, or azelaic acid are great for sensitivity and redness,” Dr Andric says.
“If breakouts or flushing are persistent, see a dermatologist; there are safe and effective medical treatments available.”
And don’t forget that consistent sleep, hydration and stress reduction are likely to be more powerful than that sell-out serum you keep seeing on social media.
common myths about adult skin changes
Isabella says one of the biggest myths is that acne is a teenage concern that disappears once you reach adulthood.
“In reality, adult acne is incredibly common, especially for women navigating hormonal shifts in their 30s and 40s,” she says.
“Another misconception is that it should be treated the same way as adolescent acne with harsh, stripping products. In fact, that approach often weakens the skin barrier and exacerbates inflammation.
“Adult skin requires a far more sophisticated, gentle strategy that supports hydration, calms sensitivity, and restores balance rather than punishing the skin.”
A supportive skincare routine FOR YOUR 30s and 40s
Isabella says it’s pared back, “a mild cleanser, a hydrating serum or antioxidant, a nourishing moisturiser, and daily SPF, which is non-negotiable no matter the season”.
She also says adding touch therapy, such as facial massage or techniques like Kobido or buccal massage, can further support circulation, lymphatic drainage, and relaxation.
“Consistency and kindness to your skin always outweigh the number of products, and taking a gentle, mindful approach helps the skin stay resilient and radiant through your 30s and 40s.”
Is it too late to start CARING ABOUT SPF and barrier repair?
“It’s never too late,” Isabella says. “SPF protects against accelerated ageing and skin cancer, while barrier repair restores resilience and supports overall skin health. Starting now still makes a profound difference to your skin’s long-term health and appearance.
“Be wary of hybrid products that claim to include SPF because often, the amount is insufficient because the main product formula cannot adequately deliver full protection. I’m not against hybrids entirely, but for reliable and safe protection, a dedicated layer of SPF is always best.”
Reframing Skin Changes
Instead of viewing skin changes as a betrayal, what if we treated them as a conversation? My rosacea has forced me to slow down, to rethink my approach, and to honour that my skin is part of my overall wellbeing. It’s no longer about fighting against my reflection in the mirror, but about listening to what it’s telling me.
Disclaimer: The information in this article is general in nature and is not intended to diagnose, treat, cure or prevent any disease. It should not replace professional medical advice, diagnosis or treatment. Always seek the guidance of a qualified healthcare professional, such as a dermatologist or your GP, with any questions you may have regarding your skin or health.
MUSE PAPER
ISSUE 08