Nobody warned me about this one, and I doubt anyone warned you. It is not on the discharge leaflet. It is not on the product packaging. The GP who prescribed the pads probably did not mention it. And the handful of places that do cover it are written for frail, elderly, hospital patients, as if a leak and a fungal infection only happen to men in their eighties on a ward.
They do not. The risk here is not about your age. It is about what a worn pad does to the skin underneath it, and that applies just as much to a 35-year-old cyclist or a larger bloke with a few skin folds as it does to anyone in a care home. So here is the bit nobody talks about, in plain English.
What thrush actually is
Thrush is an infection caused by a yeast called Candida albicans. The thing to understand is that Candida already lives on your skin, in your gut and on the moist linings of the body. Most of the time it sits there doing nothing. The word for that is commensal: present, harmless, kept in check.
What tips it from harmless resident to active infection is a change in conditions. Candida needs warmth, moisture, and skin whose natural defences have been knocked down. In men it most often shows up as balanitis, redness and soreness under the foreskin. But for men wearing a pad, the more relevant version is candidal intertrigo: a fungal infection in the skin folds of the groin, inner thighs and around the back passage. In other words, exactly the zone a pad covers and seals.
How a pad creates the perfect conditions
Warmth and moisture, trapped
A pad sits against the skin and stops air getting to it. Heat and moisture build up between your skin and the product. A 2017 review in Dermatology and Therapy on absorbent hygiene products spells it out: covering skin like this raises the local humidity, the temperature and the amount of microbial growth in the covered area. The microclimate under a pad is simply a different place from open, ventilated skin: warmer, wetter, stiller. The longer the pad stays on, the more extreme it gets. A pad near its limit is holding a load of warm, urine-soaked material right against you.
The acid mantle under attack
Healthy skin has a slightly acidic coating, the acid mantle, sitting at around pH 4.5 to 5.5. At that acidity, Candida stays suppressed. Fresh urine is not really the problem here, it starts out close to skin pH. The problem is what happens as urine sits.
Bacteria on the skin produce an enzyme called urease, which turns the urea in urine into ammonia. Ammonia is alkaline, so the skin surface pH climbs. As Kottner and Dissemond set out in a 2025 review in Drugs and Aging, once the pH rises the skin barrier weakens, the outer layer starts to break down, and inflammation kicks in. The acid mantle that was keeping Candida in its place is gone. If that chemistry sounds familiar, it is the same urea-to-ammonia reaction that causes the stale-urine smell. Same process, longer dwell time, two different consequences.
IAD: the stepping stone to infection
There is usually a stage in between, called incontinence-associated dermatitis, or IAD. It is a red, sore, irritant rash caused by urine sitting on skin that occlusion has already compromised. It is not yet a fungal infection, but it is the open door to one. Kottner and Dissemond describe IAD as very often coming with a secondary infection, most commonly Candida. An Australian hospital study (Campbell, Coyer and Osborne, 2016) found clinical signs of fungal infection in about a third of patients who had IAD. An earlier US study (Junkin and Selekof, 2007) found roughly one in six incontinent patients with IAD also had a secondary candidal infection.
Worth being straight about the numbers: those come from hospital patients, who are older and sicker than most men reading this. Your risk managing your own continence at home is lower. But the mechanism is identical, and the way you stop it is the same.
Who is most at risk
Anyone wearing a pad carries some baseline risk. A few things push it up sharply, and notice how few of them are about being old:
- Wearing a pad longer than you need to. The single biggest factor. Longer dwell time means more urea turned to ammonia, a bigger pH swing, more skin damage. Prostate Cancer UK's 2023 report Lifting the Lid on Male Incontinence found 87% of men had worn a pad longer than they wanted to, and 64% had a physical health knock-on, including rashes, thrush, infections and sores. The men overwearing are the men most at risk.
- Diabetes. One of the strongest risk factors for thrush full stop, ahead of incontinence. Higher blood glucose feeds Candida, and if nerve sensation is reduced you may not notice the early warning signs.
- Carrying extra weight or loose skin. Skin folds in the groin and inner thigh already make warm, damp, friction-prone pockets before a pad is anywhere near. Add a product and you stack one risk on another. (If that is you, this sits right next to what I wrote in the excess-skin guide.)
- An intact foreskin. Candidal balanitis is more common in uncircumcised men, because the space under the foreskin is warm and low-airflow. Combine that with a pad and it is a distinct hotspot.
- A course of antibiotics. Broad-spectrum antibiotics knock back the ordinary bacteria that keep Candida in check, so a course while you are wearing pads is a window of higher risk. Most prescribers will not think to mention it.
- Washing with ordinary soap. Standard soap is alkaline, around pH 9 to 10. Scrubbing with it after every change strips off the acid mantle that the urine has just disrupted. Common, and counterproductive.
Telling an ordinary rash from thrush
This is the part that actually matters day to day, because IAD and a candidal infection look similar at a glance and they are not treated the same way. Barrier cream is right for plain IAD and will not clear a fungal infection. An antifungal is right for thrush and is wasted effort if there is no fungus there. Get the two mixed up and you treat the wrong thing.
Plain IAD (irritant, no fungus) tends to look like: diffuse redness following the area the pad touches, a fairly even colour that fades gradually into normal skin, often a burning or stinging feel when urine hits it, and no separate spots away from the main patch.
Candidal infection (fungus present) tends to add: a deeper or more vivid central redness with a clearer edge, often white scaling or a whitish film in the folds, more itch than sting, and the giveaway, satellite lesions. Those are small distinct spots or pustules sitting clearly outside the border of the main rash. That satellite pattern is the key sign. Plain IAD does not produce it. If you can see discrete spots beyond the main red area, that points to thrush. If you are not sure, get a pharmacist or GP to look before you start treating.
Habits that keep it from happening
The whole game is denying Candida the warmth, moisture, alkalinity and broken skin it needs. None of this is elaborate.
- Change more often. This is the main lever. A pad changed promptly causes far less pH disruption than one worn to saturation. If the thing stopping you is nowhere to dispose of it, carry sealed disposal bags so you are not held hostage by whether there is a bin.
- Clean with a pH-balanced, no-rinse cleanser at every change, not soap. Structured skin care like this, rather than scrubbing with soap, is one of the better-evidenced things you can do to cut incontinence-related skin damage (Holroyd, 2014; Beeckman et al., 2016 Cochrane review). Do not rub. Pat dry.
- Use a zinc-based barrier cream at each change. Zinc oxide puts a physical layer between skin and urine and blunts the pH hit. It is prevention, not treatment, it will not kill a fungus, so a thin even layer over the contact zone and folds.
- Give the skin some air when you can. Even five or ten minutes without a product between changes breaks up that sealed microclimate.
- Skip the talc. It does nothing about the pH problem, can clog the skin in that area, and carries its own question marks. Use a zinc or dimethicone barrier instead.
- In hot weather, change more often still. Heat speeds the whole reaction up. Summer is the high-risk season (more on that in the hot-weather guide).
When barrier cream is not enough
Barrier cream prevents and protects. It does not kill Candida. If a fungal infection is already established, it will not shift it.
If you have that satellite-lesion pattern, the first-line treatment is clotrimazole 1% cream, sold over the counter in the UK as Canesten, no prescription needed. Apply it across the main rash and the satellite zone, two to three times a day, and keep going for at least two weeks, in stubborn cases up to four, even once it looks clear. Candidal intertrigo in skin folds comes back if you stop too early. Miconazole 2% and econazole 1% are over-the-counter alternatives, and all three cover both Candida and the related fungi. Nystatin treats Candida only and is prescription-only here.
One caution: do not reach for a combined antifungal-and-steroid cream like Canesten HC without advice. The steroid calms the itch but can dampen the skin's own defence, which can make things worse if the diagnosis is not certain.
See a GP or pharmacist if:
- it is no better after two weeks of correct antifungal treatment
- there is skin breakdown, open or weeping areas
- you have a fever or feel unwell with it
- the rash is spreading while you treat it
- you are diabetic and have any skin breakdown in that area, which is worth getting looked at promptly whatever the cause
- you are immunocompromised for any reason
- it keeps coming straight back, which can need an oral antifungal (fluconazole) or a look for an underlying cause such as undiagnosed diabetes
For more extensive or recurrent cases a GP may prescribe oral fluconazole, often a single 150mg capsule or a short course.
The broader point
The risk here is not built into incontinence. It is a product-use and skin-care problem, with a clear mechanism and a short list of things that fix it: change sooner, a pH-balanced cleanser, a zinc barrier, and a bit of air. Do those and you have taken most of the risk off the table.
The reason none of this reaches you is the same reason most of what we cover does not reach anyone: male incontinence is under-researched in ordinary, at-home populations and under-explained to the men living it. The knowledge exists, mostly buried in nursing and wound-care journals. It just never makes the trip to the people who actually need it.
Not medical advice. This is general information. If you have skin that is breaking down, an infection that is not settling, or you feel unwell alongside a rash, see a GP. If you are diabetic, get any broken skin in that area checked promptly.