It is a fact that heat-induced melasma and sweat will aggravate melasma in Australia even if one is being diligent with sunscreen. How so? In brief, heat rouses pigment cells, visible light compounds matters and the combination of sweat and friction can get under the skin and raise inflammation levels. Here in Australia you have a difficult mix on your hands, so it’s essential to explore strategies for preventing heat induced pigmentation.
Noah Campbell here. You become quite pragmatic about how your skin conducts itself in the heat when you put down time near Cairns as I have. After a while outside you realise certain skin issues are not merely a case of sunburn. Melasma is deceptively like that. Many would have you believe it is all down to UV but heat is also a trigger for melasma, be it from the humidity or a hard workout, or being in the kitchen, or what was meant to be a quick dash outdoors that has you in a lather.
The Significance Of Heat
Pigmentation and sunshine are often equated and for good reason. Yet melasma is more of a bother than that. The everyday life in this country with its strong sun and long hot seasons means the skin is reacting to something beyond direct UV.
You do not have to be on a beach in Port Douglas to have a flare-up. Be it a gym session, some time at the bus stop or walking through a car park that is as flat and hot as a pancake, it does not matter.
Defining Melasma
Hyperpigmentation is the term for it; it leaves patchy tan, brown or grey-brown marks on the jawline, upper lip, cheeks and forehead. Hormones, sunlight and heat are among the things that activate melanocytes. While women tend to have it more, men who work in the open or are in harsh conditions are not immune.
In the course of any discussion on melasma in Australia you will see people making the error of putting every dark patch in the same category. It is not the same as a mark from a scrape or a breakout and your prevention should reflect that.
How Heat Gets Underway
There is some technicality to it but it is useful to know why otherwise sound habits may not be enough. Heat is no cosmetic inconvenience.
To use my own words, if UV is the troublemaker then heat is the one that shows up uninvited and puts in for dinner.
Thermal Stimulation
Clinical commentary and research will tell you thermal stimulation is at play. Put simply, a rise in skin temperature makes the melanocytes more of a goer. So infrared heat can leave you with more stubborn and darker pigment even with some control over the UV.
And there is talk of infrared radiation because the energy it puts out can foment micro-inflammation which in turn feeds the production of pigment. Is heat a trigger for melasma? Yes, it is.
Sweat And Visible Light
For those with a medium to deeper tone, visible light is part of the equation and regular sunscreen is not always sufficient. A tinted product with iron oxides will afford better protection.
As for sweat, it is not going to conjure up pigment but it can lead to it in an indirect fashion. Left on the skin and chafed by a hat, towel or the edge of a mask, the irritation can result in post-inflammatory hyperpigmentation or put the lie to your melasma.
Where It Pops Up
The Australian climate is well suited to set off melasma with the glare, the reflected light and the length of the outdoor season. Throw in commuting and sport and the skin has little respite.
More often than not it is not a single incident but the cumulative effect of low-level exposure: the morning dog walk, picking up the kids, a run at lunch to break a sweat or standing at the barbecue and trying not to melt.
Much of the north in particular has long spells of heat where the skin is left to both the UV and the warmth. The humidity in Townsville, Darwin or Cairns will have you feeling the effects as sweat is less able to evaporate. During the wet season it is like being under a canvas tarp that has been left out in the rain and your skin is all too aware of it.
There are good reasons cooling is as important as putting on sun protection: the Bureau of Meteorology would tell you Australia’s climate is prone to its share of UV and heat extremes. For the official word on present heat conditions, consult the Bureau of Meteorology heatwave information for Australia.
Exercise, Saunas And Hot Rooms
One can be forgiven for having misgivings about melasma from hot yoga or the sauna. Prolonged heat to the face and an elevated core temperature will bring on melasma in some. It is not necessary to forgo exercise but one has to be mindful of how, when and what one does to cool down.
Then there are kitchens, an easy trigger to miss. The infrared heat from ovens and grills is something home cooks, bakers and those in hospitality are put up to for hours on end. I have had conversations with business owners and men working outdoors who were fastidious with their sunscreen yet the pigmentation would not budge thanks to the indoor heat.
What Most People Get Wrong
A great deal of frustration is born of doing the right thing here and there and not seeing the patterns behind a flare-up. So this is where the focus should be. You are not going to find a miracle product to stave off melasma; it comes down to taking the accumulated stress off the skin.
There is a gulf between expectation and reality. One might think sunscreen will put right any problem, but the truth is if you are overheating your face on a daily basis, subjecting it to harsh treatments and rubbing at it, the sunscreen has to do a lot of work by itself.
The Big Slip-Ups
Sweat off your morning application of sunscreen and think it is still covering you.
Opt for an untinted formula even though visible light is an issue.
Put in a hard session in the height of the heat and then give your face a vigorous scrubbing.
Overdo the active ingredients, peels or acids and invite post-inflammatory hyperpigmentation and other sweat problems.
Fail to account for the heat in a car, warehouse, kitchen or a hot yoga studio.
Cooling Habits That Work
You do not require a radical change of skin regimen, just one that will see off the heat load and friction and let your sunscreen remain in place. To head off heat induced pigmentation, plan as you would for a day in the bush: have the right gear, eschew the worst of the conditions and do not wait until matters have gone pear-shaped.
Daily Prevention Tactics
Make allowances for the heat. Take your exercise earlier, stay to the shade of the street and allow the skin to come down after activity before you put anything else on it. A fan or an air-conditioned break is well worth it.
Clothing is of more import than is often thought. A wide-brim hat is fine so long as it is not chafing the same part of the face day in day out. Go for breathable material, a loose collar, a headband to wick away the sweat. If you are working outside, take a few minutes to cool down before your face resembles a camp stove.
Realistic One-Day Plan
For a single day of better routine, make three changes: put off the midday heat, use a tinted mineral sunscreen that is kind to melasma and be done with the aggressive cleansing once you have sweated. More is to be made of that than five new serums.
It is an approach for the gym-goer, the runner, the active parent or anyone making a commute in these climes, including outdoor workers. Those with a long history of severe melasma may need to put together a plan with a dermatologist.
Smarter Sun And Light Defence
When it comes to melasma, not every sunscreen is created equal. Broad UV claims will not suffice for many, particularly with visible light melasma. Look for a broad-spectrum product with sound UVA/UVB coverage and a tint.
Details count. An impressive label means little if in twenty minutes in Cairns the thing is greasy, irritating or has run off with the perspiration.
What To Look For
Any broad-spectrum sunscreen will do as a minimum. But for skin with a tendency to melasma, zinc oxide and titanium dioxide are the mineral filters most clinicians will recommend. Tinted products with iron oxides are very useful where visible light is a concern.
In the matter of melasma and tinted mineral sunscreen, one is apt to see recommendations put a premium on reapplication and how well a product wears. There is little point in a formula that stings or pills, or one that under humidity has the consistency of sardines; it will be put aside for something more agreeable. A perfect product is no use if it is left in the bathroom drawer when there is a good one at hand you are inclined to put on and put on again.
| Trigger Or Setting | Why It Matters | Practical Response |
| Out in the sun | UV and visible light | Tinted broad-spectrum, hat and shade, do not forget to reapply |
| Working up a sweat in the heat | Friction and build-up from exercise | Make an early start of your training, cool the face down, do not rub at it |
| Hot yoga or the sauna | Prolonged facial heat and a rise in core temperature | Steer clear in times of active flare-up or cut back |
| Oven and kitchen duties | The infrared heat you are subjected to | Put some distance between yourself and the heat with a fan or a break, keep skincare simple |
| After a sweat, harsh products | Risk of PIH and micro-inflammation | A mild cleanser and unassuming moisturiser will do, no scrubbing |
One will not find an official Australian figure for the number of melasma flare-ups attributable to heat and sweat, nor would I make one up. What can be put to rest is that UV here is frequently high or extreme and clinicians are of the mind that heat, inflammation and visible light are aggravating factors for pigment disorders.
Skincare That Keeps Calm
If the skin is reactive you are not going to wage war on it. The idea is to put a lid on inflammation and have the barrier protected. It is only natural to want to reach for strong actives when the pigment is so vexing, but overcorrecting is not always the wiser course. To quote Noah Campbell: should your routine leave your face feeling hot and tight, do not expect your skin to be grateful for the trouble.
Use And Avoid
Stick to the helpful sort of things: a non-irritating moisturiser, a GP or dermatologist’s choice of pigment treatment and a gentle cleanser. On a professional level azelaic or tranexamic acid, niacinamide and the like may be put forward.
Then there is what to eschew when prone to flaring: any stinging fragranced product, a habit of layering “active” serums at random, strong scrubs and acids. Irritation is the precursor to post-inflammatory hyperpigmentation which muddies the water.
When Home Care Is Not Enough
Sensible changes to one’s lifestyle will not always be sufficient. It is not a personal failing, merely an indication the melasma is being driven by a confluence of hormones, genetics, light and inflammation. At that juncture the expense and time of professional counsel is justified. An Australian GP is in a position to evaluate the pattern and make a referral to a dermatologist as the case requires; the RACGP and Australasian College of Dermatologists are good places to look for evidence-based care.
Professional Options
There is prescription creams, procedures and a review of hormonal matters. Some in-clinic work is ill-suited to melasma and can do more harm than good if mishandled, so let “quick fix” claims pass with a raised eyebrow.
Names that come up in online forums are Heart Aesthetics Hobart, Abby Health, Dermedica, Rejuvaustralia, The Skin Lab and Victorian Dermal Group. But before engaging a clinic, look into the practitioner and his or her experience with melasma and be circumspect of any plan that does not take a proper history.
A Simple Daily Routine
For those who work outdoors or parent or commute in a climate where the steering wheel is a frying pan by 10 o’clock, a 14-step affair with a sherpa is superfluous. You are better off with a system you can repeat.
This is the way to do it in Australia. In the morning a rinse with lukewarm water if the skin prefers it, or a gentle cleanse. For dry or reactive skin a basic moisturiser will do.
A tinted broad-spectrum sunscreen containing zinc oxide and/or titanium dioxide is the way to go; put in one with iron oxides if you are prone to visible light as a trigger. Make use of shade when you can and put on a hat with a good brim. Time any outdoor pursuits for early or late in the day, away from the height of the heat. And when you have been sweating, be gentle in patting dry, no need to scrub as though you were at it with a camp billy. Be sure to put your sunscreen back on per the instructions, heavy sweat or not. In the evening let your skincare be of a calming nature and do not put on irritating actives.
Australian Help Pathways
To get some local support that is evidence-based, keep it simple. The GP is generally the place to begin, particularly with an uncertain diagnosis or recent changes in pigmentation. A dermatologist’s referral down the track can spare you the trial-and-error and the expense.
As things stand, the prudent course in Australia for melasma is to have a clinician make the assessment and to be consistent with prevention. Should you be pregnant or breastfeeding, or have darker patches following irritation, or even doubt it is melasma, have it seen to instead of making guesses.
Access, Cost And Practicalities
A standard GP visit is where most will put in their first call but out-of-pocket fees are a matter of location and clinic. Private GPs in Australia have a wide range of charges and seeing a specialist dermatologist will set you back more, with wait times in metro areas different to regional ones. As for parking and access, that is up to the clinic so a ring ahead is advisable. It is easy to overlook and makes for trouble when you are trying to book around work or the school run.
Telehealth is an option for initial advice in the regions, yet an in-person review is often required to be sure of the diagnosis. Patchy, symmetrical pigment made worse by the heat would point to melasma, but other forms of hyperpigmentation can present the same way.
Final Takeaway
One should not think of heat-induced melasma as merely sun damage with a better moniker. Under Australian conditions there is heat, visible light, friction, sweat and inflammation to contend with and they will all exacerbate melasma. An effective method is to layer your approach: limit the heat, shield from UV and visible light, be unobtrusive with your skincare and turn to a medical professional when home remedies fall short.
The best thing to remember is to look at the pattern over a few weeks to judge your routine, not one hot day. Melasma is as tenacious as a mozzie in a tent but the right sort of habits will see off the flare-ups and put things in order.
Faq Quick Answers
How To Stop Heat-Induced Melasma?
Do what you can to cool the skin, stay off exercising in peak temperatures, be gentle with your skincare and reapply a tinted broad-spectrum sunscreen after a good sweat. Persistent flaring calls for a GP or dermatologist.
Will Melasma Go Away If I Balance My Hormones?
Not of itself. While hormones are part of it, light, heat and genetics mean melasma will often persist. Managing your hormones may be of assistance but seldom provides the complete solution.
What Triggers Melasma To Worsen?
You have UV and visible light, infrared and plain heat, hormonal shifts, friction, inflammation and the like. In this country hot weather and the perspiration it brings can be enough of a load.
Do Saunas Make Melasma Worse?
They have a way of doing that. The prolonged heat in a sauna can rouse the pigment and inflame the skin, leading to a flare-up. Those with easily triggered melasma are better to curtail their time in the sauna.
Is Sweat Causing The Pigment Directly?
More an aggravation than a direct cause. For some it will add to the irritation and friction and thus the melasma or lead to post-inflammatory hyperpigmentation.