From friction and moisture to the finer details of your running kit, here's how to keep skin irritation from cutting your run short.
You can get your pacing right, nail your hydration and prepare for every kilometre.
And still have your run ruined by a seam.
Chafing is one of running's less glamorous problems. Repeated friction, sweat and thousands of strides can turn a minor irritation into something that makes every step uncomfortable.
Inner thighs, underarms, nipples, waistbands and feet are common trouble spots. And while longer runs create more opportunities for irritation, chafing isn't exclusive to marathon training.
The good news? Most running-related chafing can be prevented with a few practical adjustments.
Here are five worth making before your next run.
1. Reduce Friction Before It Starts
Chafing occurs when repeated rubbing irritates and damages the skin, particularly when sweat and moisture are involved.
The simplest defence is to reduce friction before it becomes a problem.
An anti-chafe stick, like the TEGO Glide Stick, creates a lubricating barrier that helps minimise rubbing around common hotspots such as the inner thighs, underarms and waistline. Apply it before your run, particularly in areas where you've experienced irritation before.
For men, nipples are another common trouble spot, especially during longer runs when damp fabric repeatedly brushes against sensitive skin. Purpose-made nipple covers provide a physical barrier, while anti-chafe products may also help.
The important part is anticipating where friction is likely to occur rather than waiting for discomfort to begin.
Prevention works better than damage control at kilometre 12.
2. Manage Moisture, Not Just Sweat
Sweat itself isn't the enemy. It's what happens when moisture stays trapped against your skin.
Prolonged moisture can soften the skin's outer layer, making it more vulnerable to repeated friction. Add heat, humidity and thousands of strides, and the conditions for chafing become considerably more favourable.
This is particularly relevant when running in hot and humid environments, where sweat evaporates less efficiently.
Start with dry clothing, avoid unnecessary layers and choose breathable, moisture-wicking fabrics that help move sweat away from your skin.
If you're heading out for a particularly long run, consider how your clothing behaves once it's saturated, not just how comfortable it feels when you first put it on.
And change out of damp clothing after your session rather than allowing moisture and friction to continue irritating your skin.
The goal isn't to stop sweating. It's to stop moisture from becoming a problem.
3. Pay Attention to Seams and Fit
You could be wearing the lightest, most breathable running T-shirt available. But if a seam repeatedly rubs against the same patch of skin, fabric technology alone won't save you.
Raised seams, rough labels and poorly positioned stitching can create friction points that become more noticeable as distance increases.
Running apparel with bonded or low-profile seams can help reduce the amount of raised material rubbing against your skin.
But construction is only half the equation.
Clothing that's too loose can shift repeatedly, while overly tight garments may create uncomfortable pressure. Even a well-designed garment can cause irritation if the fit isn't right for your body or running movement.
Pay particular attention to areas that experience repeated contact: underarms, inner thighs, waistbands and the edges of sports bras.
The best running apparel doesn't just move with you. It stays out of your way.
Shop TEGO's Running collection here.
4. Get Your Base Layer Right
Sometimes the problem isn't your running shorts. It's what's underneath them.
Loose, poorly fitted underwear can bunch up, trap moisture and create friction around the groin and inner thighs. Over thousands of strides, even minor irritation can become a problem.
There are two ways to get this right. Performance boxers worn under unlined running shorts, like the TEGO Lift Boxers, offer a separate supportive layer. Alternatively, lined running shorts, like the TEGO Pacer Lined Shorts, integrate that support directly into the shorts, eliminating the need for additional underwear.
Both approaches can help minimise excess movement and friction. What matters is a secure fit, effective moisture management and smooth construction that stays comfortable over distance.
Avoid unnecessary layering, particularly in humid conditions where additional fabric can trap moisture and create more opportunities for rubbing.
The best base layer is the one you forget you're wearing.
5. Don't Overlook Your Socks
Your feet experience thousands of repeated movements inside your shoes during a run. Even small friction points can eventually develop into painful blisters.
Moisture makes matters worse. Cotton socks tend to retain sweat, while moisture-wicking performance socks can help manage dampness against the skin.
Look for socks that fit securely without bunching, have either a seamless or low-profile toe seams, and provide enough cushioning for your preference without making your shoes feel tight. The TEGO Ultralight Quarter Socks does exactly that.
Sock thickness matters too. A thicker sock isn't automatically better if it reduces the available space inside your shoe.
And remember, socks are only part of the equation. Footwear that's too tight, too loose or poorly fitted can create friction regardless of what you're wearing.
The right running socks should go unnoticed, even when the kilometres add up.
What If Chafing Has Already Started?
A little irritation early in a run can become considerably more uncomfortable as friction continues.
If you notice a hotspot developing, address it before the skin becomes more irritated. Adjust clothing that's rubbing, and avoid continuing to expose the affected area to unnecessary friction.
After your run, gently clean the area, pat it dry and allow the skin to recover. A simple protective ointment may help with minor irritation, while broken or severely irritated skin may need additional care.
Avoid running in clothing that continues to rub the affected area until it has healed. Seek medical advice if you notice spreading redness, increasing pain, warmth, discharge or other signs of infection.
And before your next long run, test your complete kit during training. A T-shirt or pair of shorts that feels perfectly comfortable over 5 km may behave differently at kilometre 18.
Race day is for testing your fitness. Not your wardrobe.
The Takeaway
Running chafing is rarely the result of one dramatic equipment failure. It's usually small amounts of friction repeated thousands of times.
Reducing friction, managing moisture, paying attention to seams and fit, choosing the right base layer and wearing appropriate socks can all help keep irritation from becoming a distraction.
These might seem like small details. But over longer distances, small details have a way of making themselves known.
Your training should be the hard part. Not what you're wearing.
References
1. American Academy of Dermatology Association. How to Prevent and Treat Blisters. Guidance on reducing friction, selecting moisture-wicking socks and protecting blister-prone areas.
2. Cleveland Clinic. How to Prevent Chafing. Explains how friction, moisture, clothing and protective lubricants contribute to chafing prevention.
3. Cleveland Clinic. Runner's Nipple: Causes and Prevention. Guidance on preventing nipple irritation through protective barriers and clothing choices.
4. REI Co-op. How to Prevent and Treat Chafing. Practical recommendations for managing friction and selecting suitable running apparel.
