How to Prevent Blisters on Feet From Running

Running blisters form when repetitive shear forces inside the skin cause the upper layers to separate and fill with fluid, and the most effective prevention targets three overlapping factors: friction, moisture, and shoe fit. No single trick eliminates blisters entirely, but combining strategies across those categories can dramatically reduce how often they appear. The science behind each strategy is more nuanced than the typical advice suggests, and some popular remedies work far less well than runners assume.

Why Blisters Form in the First Place

The common explanation is that blisters come from “rubbing,” but that oversimplifies what is happening. A blister does not form at the surface where your skin contacts the sock. It forms deeper, within the outer skin layer itself. When your foot pushes forward inside the shoe and the surface of your skin stays put (held by friction against the sock or insole), the layers beneath get stretched and sheared apart. That internal shearing kills cells in the upper skin, and the gap fills with clear fluid.¹ Understanding this matters because it changes how you think about prevention. You are not just trying to make your foot “slide more easily.” You are trying to reduce the forces that pull your skin layers apart. That can mean reducing friction, yes, but it can also mean reducing the movement of your foot inside the shoe, controlling moisture, or toughening the skin over time.

Moisture Is a Bigger Factor Than Most Runners Realize

Wet skin sticks to socks and insoles more aggressively than dry skin, which increases the surface grip that causes those deeper shearing forces. A 2024 study of hikers measured skin hydration levels on feet that developed blisters versus feet that did not. Feet that blistered had measurably higher hydration levels, and the relationship held across both feet. Younger participants, who naturally had more hydrated skin, were more prone to blisters as well.² This means that anything increasing foot moisture, whether it is sweat, rain, or running through puddles, raises your risk.

One approach that has shown real results is applying an aluminum chloride antiperspirant to the feet before activity. In a trial with military cadets who applied the product for at least three nights before a long hike, the blister rate dropped from about 48% in the placebo group to 21% in the antiperspirant group.³ That is a meaningful reduction, but there is a catch: skin irritation was reported by more than half of the antiperspirant users, compared to just 6% of those using a placebo. So you may be trading one problem for another. The irritation seems to come from the higher aluminum chloride concentrations used in clinical-strength products. If you try this, test it on a small area first and start several days before a long run so any reaction shows up before race day.

Foot powders are another popular moisture-control method, but the evidence for them is weaker. An older review of blister prevention research concluded that drying powders applied to the foot do not appear to decrease the likelihood of blisters.⁴ The problem may be that powders clump once they absorb sweat, creating uneven surfaces that actually increase localized friction. Some runners swear by them for short runs, but for longer distances where sweat accumulates, they tend to lose effectiveness quickly.

What the Research Says About Socks

If you have ever been told to switch from cotton to synthetic socks to prevent blisters, the evidence is less clear-cut than the advice implies. Acrylic and synthetic fibers do wick moisture faster than cotton, but a study comparing cotton and acrylic socks found no difference in blister rates when both socks used the same generic cushion-sole design. The advantage of synthetics only appeared when the sock construction included adequate anatomical padding tailored to high-friction zones.⁵ In other words, the knit structure and padding placement of the sock may matter more than the fiber material alone.

Double-layer socks, which have an inner liner that slides against an outer layer, are designed to shift the friction plane away from your skin. The idea is that the two sock layers shear against each other instead of your skin shearing against the sock. Some runners find them helpful, though the published evidence across all sock interventions remains limited. A systematic review of blister-prevention strategies noted that the overall quality of evidence for socks was low, and no sock strategy had strong enough data to be recommended with high confidence.⁶ That does not mean socks are irrelevant; it means the research has not caught up to runner intuition. Practically, a well-fitted synthetic sock with padding over your usual hot spots is a reasonable starting point, and adding a thin liner sock underneath adds another friction-absorbing layer.

One military study found that pairing a thin inner polyester sock with a thick outer sock made of wool or polypropylene, specifically one that maintained its bulk when wet, reduced blister rates in Marine recruits.⁷ That two-sock approach may be too warm for short road runs in summer, but for trail running, ultramarathons, or cool-weather training it is worth experimenting with.

Paper Tape as a Barrier

Of all the blister-prevention strategies studied, paper tape has the most interesting evidence, even though it sounds almost too simple. A randomized trial of ultramarathon runners found that paper tape applied to known blister-prone areas reduced blister incidence by about 40%, a statistically significant effect.⁸ Paper tape is cheap, thin, breathable, and easy to apply, making it one of the most practical options available.

However, the story is not perfectly clean. An earlier trial by the same research group, conducted during a multi-day ultramarathon, found no protective effect from paper tape. All participants in that study developed blisters, and blisters actually formed under the tape more often than around it. Despite that, 84% of participants said they would still choose paper tape for future events.⁹ The discrepancy between the two trials may come down to intensity and duration: multi-day events generate so much moisture and repetitive stress that tape alone cannot keep up. For single-day runs and races, the evidence is more encouraging. The systematic review of blister-prevention strategies concluded that paper tape had the highest confidence as an effective barrier method among all interventions examined.⁶

If you use paper tape, apply it to clean, dry skin, smooth out any wrinkles (creased tape creates new pressure points), and apply it the morning of your run rather than the night before. Runners prone to specific hot spots on the toes, heel, or ball of the foot can pre-tape just those areas. Some people also use moleskin, athletic tape, or kinesiology tape for the same purpose, though none of those have the same quality of trial evidence behind them.

Shoe Fit and the Toe Box Problem

A shoe that is too tight compresses the toes together, increasing skin-on-skin friction between digits. A shoe that is too loose lets the foot slide more with each stride, increasing the shearing forces across the sole and heel. Getting the fit right is probably the single most impactful thing you can do, even though it is harder to study in a controlled trial than applying tape or changing socks.

Toe blisters are among the most common locations for runners, and the shape of the toe box plays a direct role. Research on forefoot pressure in different shoe shapes found that a rounded toe box produced the least pressure around the inner toes, while a pointed shoe concentrated pressure on the inner side and increased contact time there.¹⁰ For running, a toe box that allows your toes to spread naturally without pressing against each other or the shoe wall is ideal. Your feet swell during a run, sometimes by half a size or more, so many experienced runners buy shoes a half size larger than their casual shoes and test fit in the afternoon when feet are already slightly swollen.

Lacing technique is an underappreciated variable. Locking the heel in place with a runner’s loop (using the extra eyelet at the top of most running shoes) reduces heel slip without tightening the forefoot. If you notice blisters mostly on the tops of your toes or midfoot, loosening the lower laces while keeping the upper ones snug can help redistribute pressure. The goal is a locked heel with a relaxed forefoot.

Insoles and Orthotics

Aftermarket insoles can change how forces distribute across the bottom of your foot. The same review that found limited evidence for powders did note some evidence that closed-cell neoprene insoles can reduce blister incidence.⁷ Neoprene has a slightly grippy surface that reduces foot sliding while also absorbing some of the shear force. Custom orthotics prescribed for biomechanical issues like overpronation can indirectly help by keeping the foot more stable inside the shoe, though there is no strong direct evidence linking orthotics to blister prevention specifically. If you use insoles, make sure the shoe still fits well with them inserted; adding volume inside the shoe without going up in size can create the same tight-fit compression problems described above.

Training Your Skin to Resist Blisters

Skin is remarkably adaptable. Repeated low-level friction exposure triggers the outer skin layers to thicken and proliferate, forming calluses that resist future shearing.¹¹ This is why blisters are more common early in a training cycle, during a new shoe break-in period, or when you jump up in mileage suddenly. Your skin has not had time to adapt to the new stress pattern.

The practical takeaway is to increase mileage and intensity gradually, especially in new shoes. Some runners deliberately break in new shoes with short runs over a week or two before using them for long efforts. This approach does not eliminate blisters entirely, but it lets the skin on your soles and toes build up protective thickness where it needs it most. Be cautious about aggressively filing down calluses; while thick calluses can crack or tear if they get too dry, moderate callus buildup on the ball of the foot and heel is your body’s natural blister armor.

Foot Shape and Who Is More Prone

Not everyone is equally susceptible, and some of the variance comes down to anatomy. A study of endurance runners found that people with a Greek foot shape, where the second toe extends beyond the big toe, had roughly twice the odds of developing blisters compared to those with an Egyptian foot shape, where the big toe is the longest.¹² A longer second toe catches more friction at the front of the shoe, especially in a tight or narrow toe box. Bunions, hammertoes, and prominent bony areas also create localized high-pressure points that are more blister-prone. If you know your foot has these features, targeted taping over those specific areas and choosing shoes with a more generous toe box become especially important.

Younger runners tend to have more naturally hydrated skin, which, as noted earlier, is associated with higher blister risk.² Older runners’ drier skin may actually offer a slight protective advantage in this one respect, though dry skin brings its own problems like cracking. The sweet spot is skin that is neither soaking wet nor severely dry.

Putting a Prevention Plan Together

Because blisters arise from the interaction of friction, moisture, and repetitive loading, no single intervention is a magic bullet. The runners who avoid blisters most consistently tend to layer several strategies together. A reasonable starting approach:

Shoes: Ensure a snug heel with a roomy toe box, sized to accommodate foot swelling. Use a runner’s loop lacing pattern to lock the heel.
Socks: Choose a synthetic or wool-blend sock with anatomical padding. Consider a thin liner sock underneath for longer distances.
Tape: Pre-tape known hot spots with paper tape on clean, dry skin before runs over ten miles or any race.
Moisture: If you are a heavy foot sweater, test a foot-specific antiperspirant several nights before a long effort to check for irritation.
Training: Ramp mileage gradually. Break in new shoes over several short runs before using them for long distances.

Treat these as starting points and adjust based on where your blisters actually appear. A blister diary sounds excessive, but noting the location and conditions (wet weather, new shoes, long run) after each blister quickly reveals your personal pattern.

When a Blister Forms Anyway

Even with careful prevention, blisters happen. How you manage one determines whether it stays a minor nuisance or becomes a multi-week problem. Clinical guidance suggests that for an intact blister with a raised, fluid-filled roof, draining the fluid with a sterilized needle while leaving the roof of skin in place results in the least discomfort and may reduce the chance of infection. The blister roof acts as a natural bandage, and removing it exposes raw tissue to friction and bacteria.⁷

If the roof has already torn off, or if you need to keep running on a raw blister, hydrocolloid dressings (the gel-like blister bandages sold at most pharmacies) provide a moist healing environment and meaningful pain relief. A review of hydrocolloid dressings in wound management found that they reduced healing times for superficial injuries and consistently decreased wound pain across multiple wound types.¹³ Hydrocolloid patches stay in place better than regular adhesive bandages during activity and create a cushioned barrier over the wound. For a mid-race blister, they are often enough to let you finish without severe pain.

Antibiotic ointment is commonly applied to blisters, but there is no evidence that antibiotics influence blister healing.⁷ Clean the area, cover it, and let the body do the rest. Signs that warrant a visit to a doctor include spreading redness, warmth, pus, or red streaking away from the blister, all of which suggest infection rather than normal healing.

Lubricants, Powders, and Other Popular Remedies

Petroleum jelly and anti-chafe balms are probably the most commonly used blister-prevention products among recreational runners, yet they have almost no controlled trial data behind them. The theory is straightforward: a slippery layer reduces surface friction. In practice, lubricants wear off over distance, collect grit and sock fibers, and can actually increase friction once they break down. For short runs under an hour, they may help. For anything longer, they tend to become unreliable. If you use them, reapply at aid stations during ultras or carry a small packet.

Toe sleeves and gel caps made of silicone are another option, especially for blisters between toes or on the tips. They work by cushioning and creating a low-friction barrier, and many runners with bunions or hammertoes use them routinely. The downside is that they retain heat and moisture around the toe, which could theoretically raise blister risk on the surrounding skin. They are best used in combination with moisture-wicking socks rather than as a standalone fix.

Body Glide, squirrel’s nut butter, and similar products are widely recommended on running forums. They fall into the same lubricant category as petroleum jelly, and while anecdotal support is strong, no published trial has isolated their effect on foot blisters specifically. That does not mean they are useless, just that the confidence level is lower than for tape or antiperspirants. If a product has worked for you in training, keep using it. If you are looking for something with better evidence backing, paper tape is the stronger bet.

1
Current Sports Medicine Reports. Etiological Foundation for Practical Strategies to Prevent Exercise-Related Foot Blisters
2
Wiley Online Library (International Wound Journal). Influence of skin hydration level on the occurrence of blisters on the foot during hiking
3
PubMed. Influence of an antiperspirant on foot blister incidence during cross-country hiking
4
PubMed. Friction blisters. Pathophysiology, prevention and treatment
5
PubMed. Comparison of cotton and acrylic socks using a generic cushion sole design for runners
6
PubMed Central. Prevention of Friction Blisters in Outdoor Pursuits: A Systematic Review
7
PubMed Central. Friction blisters. Pathophysiology, prevention and treatment
8
PubMed. Paper Tape Prevents Foot Blisters: A Randomized Prevention Trial Assessing Paper Tape in Endurance Distances II (Pre-TAPED II)
9
Wilderness & Environmental Medicine. A Prospective Randomized Blister Prevention Trial Assessing Paper Tape in Endurance Distances (Pre-TAPED)
10
Journal of Foot and Ankle Research. The effect of shoe toe box shape and volume on forefoot interdigital and plantar pressures in healthy females
11
PubMed Central. Does plantar skin abrasion affect cutaneous mechanosensation?
12
Saudi Journal of Sports Medicine. Screening of foot defects, deformities, and diseases among endurance runners: A cross-sectional study
13
PubMed Central. Hydrocolloid dressings in the management of acute wounds: a review of the literature