Key takeaways
- Nappy rash is a common form of skin irritation in the nappy area caused by prolonged moisture, friction, and irritants.
- It can appear at any age, but is most common between 9 and 12 months, when dietary changes, teething, and increased activity come into play.
- Common nappy rash symptoms include redness or discolouration on the buttocks, spots or blisters, and visible discomfort during nappy changes.
- Triggers range from wet nappies and product sensitivity to antibiotics, diarrhoea, teething, and new foods.
- Most nappy rash clears up within a few days with frequent changes, breathable nappies, gentle cleaning, and a protective barrier balm.
Introduction
Noticing a rash on your baby's bottom can be worrying, but nappy rash (also called diaper rash) is one of the most common skin concerns in babies and toddlers. This type of skin irritation develops in the nappy area and can range from mild redness to more noticeable discomfort.
Nearly every baby will experience nappy rash at least once, and in most cases, it is mild and manageable with simple, gentle care. Understanding what triggers it and recognising the early signs can help you act quickly and keep your little one comfortable.
In this article, we will cover what nappy rash is, what it looks like, the key symptoms to watch for, and the most common causes, so you can feel informed and confident.
What is nappy rash?
Nappy rash, known medically as diaper dermatitis or napkin dermatitis, is a common form of irritant contact dermatitis that affects a baby's skin in the nappy area.
It develops when delicate skin is exposed to prolonged moisture, friction, and irritants such as urine and stool. This combination weakens the skin's natural barrier, leaving it red, sore, and prone to further irritation.
As of 2025, approximately 70% of infants experience diaper dermatitis at some point during their nappy-wearing years. The rash typically appears on the buttocks, thighs, and genital area, essentially anywhere the nappy sits against the skin. While it can look alarming, nappy rash is usually mild and responds well to simple, gentle care at home.
Nappy rash at different ages
Nappy rash can appear at any stage, but triggers shift as your baby grows.
Nappy rash in newborns
Less common in the first few weeks, but delicate newborn skin and frequent meconium changes can make it vulnerable. Gentle products and regular changes are key.
Nappy rash in babies (3–12 months)
Nappy rash is most common during this stage, with peak incidence around 9 to 12 months. Weaning, teething, and increased activity all change stool composition and increase the likelihood of irritation.
Nappy rash in toddlers
A wider variety of foods, resistance to nappy changes, illness, antibiotics, and toilet training can all trigger flare-ups.
Nappy rash symptoms and visible signs
A red rash on the baby's bottom is often the first sign. The skin may appear sore, with spots, pimples, or small blisters. On darker skin tones, the rash may appear purplish or darker than the surrounding skin, or the affected area may lighten.
Other symptoms to look for:
- Red, inflamed, or discoloured patches in the nappy area.
- Swollen or puffy skin.
- Spots, pimples, or small blisters.
- Fussiness or crying during nappy changes.
- Soreness when the area is wiped.
What causes nappy rash?
Nappy rash usually results from a combination of factors. The triggers below are more likely to cause nappy rash when combined with prolonged moisture and friction.
Moisture, friction, and prolonged contact
The most common cause. A wet or soiled nappy left on too long allows irritants in urine and stool to break down the skin’s natural barrier. Tight-fitting nappies add friction around the thighs and waist.
Irritants and sensitivity
Fragranced wipes, soaps, bubble baths, certain detergents, or a new nappy brand can irritate sensitive skin. Babies with eczema may be more prone.
Nappy rash from antibiotics
Antibiotics (taken by baby or a breastfeeding mother) may disrupt gut bacteria, leading to looser stools that irritate the nappy area. Changing nappies more often and applying a barrier balm during a course can help.
Nappy rash from diarrhoea
Frequent, loose stools contain higher enzyme activity that irritates the skin. Prompt nappy changes are essential.
Nappy rash from teething
Teething does not directly cause nappy rash, but increased drooling may lead to looser stools and changes in stool acidity, which can irritate the nappy area.
Introducing new foods
Dietary changes alter stool composition. Acidic fruits and new solid foods can increase stool acidity and trigger irritation, especially around 6–12 months when weaning begins.
How to help prevent/treat nappy rash?
Most nappy rash can be managed and prevented with consistent daily habits:
- Frequent changes and air time: Change wet or soiled nappies as soon as possible and allow your baby some nappy-free time each day. Letting the skin breathe reduces moisture build-up and gives irritated skin a chance to heal.
- Good quality nappies: Choose breathable, absorbent nappies free from harsh chemicals. Offspring's FeatherAir Premium Diapers and FeatherAir Comfort Diapers are designed to let your baby's skin stay dry and comfortable.
- Thick barrier cream or soothing balm: Apply a protective layer at every change to shield the skin from moisture and irritants. Offspring's Soothing Nappy Balm creates a gentle, natural barrier while soothing irritated skin.
- Gentle, fragrance-free cleaning and pat dry: Always pat (never rub) the skin dry. Offspring's Plant-Based Wipes, Gentle Head-To-Toe Wash, and Baby Bum Cleansing Spray offer gentle, organic options for sensitive skin.
Why gentle care matters for sensitive skin?
A baby's skin is thinner, far more delicate than adult skin, leaving it more sensitive to irritants, chemicals, and friction.
Choosing gentle, hypoallergenic, and breathable products makes a real difference in preventing and managing nappy rash, from breathable nappies that reduce moisture build-up to fragrance-free wipes that are kinder on sensitive skin.
Here are gentle care essentials designed with your baby's sensitive skin in mind:
- Offspring Baby Diapers: 100% chlorine-free, no dyes, no optical brighteners, and no lead. Paediatrician and dermatologist approved (Dermatest certified).
- Offspring Plant-Based Wipes: 100% biodegradable plant cellulose from Austria, 99% purified water, organic aloe vera, and chamomile. No fragrance, chlorine, plastic, alcohol, or parabens. Free from 46 nasties. Australian Allergy Certified, EWG Verified, Dermatest certified.
- Offspring Soothing Nappy Balm: 94.4% organic ingredients with olive oil, beeswax, calendula, and jojoba oil. No sulphates, parabens, mineral oil, or synthetic fragrance. EWG Verified, dermatologist-tested for eczema-prone skin.
- Offspring Baby Bum Cleansing Spray: 86.4% organic ingredients with aloe vera, calendula, and chamomile. Rinse-free, no sulphates, parabens, or synthetic fragrance. EWG Verified, Australian Allergy Certified.
- Offspring Gentle Head-To-Toe Wash: 61.3% organic ingredients with aloe vera, calendula, chamomile, and lavender. Tear-free, concentrated formula designed for newborns, babies, and toddlers. No sulphates, parabens, mineral oil, or synthetic fragrance. EWG Verified, Australian Allergy Certified.
Image: Offspring gentle baby care range for sensitive baby skin.
When to see a doctor?
Most nappy rash clears up within a few days with gentle home care. See your paediatrician or doctor if:
- The rash does not improve after a few days of consistent home care.
- The rash is severe, spreading, or unusual in appearance.
- There are signs of infection, such as pus, blisters, bleeding, or fever.
- The rash causes significant pain during urination or bowel movements.
- Your baby seems unwell or very distressed.
When in doubt, trust your instincts. It is always better to have it checked.
FAQs — Nappy rash
Is nappy rash common?
Nappy rash is extremely common, especially during the first year. Even with the best care, most nappy rash in babies happens at least once. It is a normal part of babyhood.
Can breastfed babies get nappy rash?
Yes. Breast milk-fed stools tend to be softer and less acidic, but breastfed babies can still develop nappy rash from moisture, friction, or product sensitivity.
Does teething really cause nappy rash?
Teething does not directly cause nappy rash, but increased drooling may lead to looser stools and changes in stool acidity, which can irritate the nappy area.
How quickly can nappy rash develop?
Nappy rash can develop within hours, especially during diarrhoea or when a wet nappy is left on too long. Regular checks and prompt changes are the best prevention.
Is nappy rash painful for my baby?
Mild cases may cause slight discomfort, but more severe nappy rash can be genuinely painful. If your baby cries during changes or resists wiping, a soothing barrier balm can help ease discomfort.
What diapers are best for diaper rash?
The best nappies for diaper rash are highly absorbent, breathable, and free from chlorine and harsh chemicals. Look for options with enhanced air circulation and a snug, gentle fit designed for sensitive skin, like Offspring's FeatherAir Premium Diapers and FeatherAir Comfort Diapers.
Conclusion
Nappy rash is one of the most common skin concerns in babies and toddlers. From redness and discomfort to spots and blisters, the symptoms are easy to recognise once you know what to look for.
The causes are varied, from moisture, friction, and irritants to antibiotics, diarrhoea, teething, and dietary changes, but the solution comes down to consistent, gentle care.
The reassuring truth is that nappy rash is normal, manageable, and usually clears up within a few days. Choosing breathable nappies, fragrance-free wipes, and gentle skincare can make a real difference for your baby's sensitive skin.
Explore Offspring's range of mindfully made baby care essentials, from chlorine-free nappies and plant-based wipes to organic nappy balm, gentle head-to-toe wash, and rinse-free cleansing spray. For personalised guidance, get in touch with the Offspring team.
