Posted by Bethan Bithell on Feb 24, 2026
Foot blisters usually start with friction. Add heat, moisture and pressure from poor fit, and you get sore hot spots that quickly turn into a fluid-filled blister. This guide explains what causes foot blisters, why heel blisters are so common, and what to change to reduce rubbing in boots and shoes.
If you want a full step-by-step plan aimed at walkers, read our complete guide to prevent foot blisters when walking.
What causes foot blisters?
People often notice blisters from shoes, blisters from boots, or blisters on feet from walking when fit, moisture and friction combine over long days.
Most blisters come from repeated rubbing in the same place. The main causes are friction, heat build-up, moisture and pressure from poor fit.
- Friction when your foot slides inside your sock or footwear
- Heat build-up inside boots or shoes
- Moisture from sweat or wet weather, which softens skin
- Pressure points from tight areas or stiff panels
- Poor fit, either too tight or too loose
This is why many walkers notice problems after long days out, wet conditions, or when breaking in new footwear.
How blisters form
Your skin sits on layers of soft tissue that move as you walk. When the surface skin and the layers underneath move at different speeds, they rub. Over time, the tiny connections between layers break and your body creates a pocket of protective fluid. That pocket is the blister.
You cannot stop your foot moving, but you can reduce the conditions that make rubbing worse by managing fit, movement and moisture.
Risk factors that make blisters more likely
Even good footwear can cause problems if the conditions are right. Common risk factors include:
- Heel lift inside the boot
- New boots that feel stiff around the collar
- Cotton socks that hold moisture
- Long downhill walking
- Wet weather or boggy ground
- Long periods on your feet for work or walking
Why heel blisters are so common
The heel is one of the most common trouble spots because it takes repeated movement with every step. In many cases the issue comes down to the heel slipping slightly inside the boot or shoe.
Common causes of heel blisters include:
- Heel lift from boots that are slightly too big
- Stiff heel counters or firm boot collars
- Socks slipping inside the boot
- Downhill pressure pushing the foot forward
- Socks that are too thin for the footwear
This is the usual cause behind shoes causing blisters on back of heel and blisters on heels from boots.
If you regularly get rubbing at the back of the heel, focus first on stopping movement in that area.
How to prevent heel blisters from boots and shoes
Preventing heel blisters comes down to reducing movement and managing moisture. Start with these steps.
1) Stop heel slip with better lacing
Heel lock lacing can reduce movement at the back of the foot and is often the quickest fix.
Use our guide to learn how to lace walking boots to stop heel slip and for practical methods that improve heel hold.
2) Choose socks that reduce rubbing
Socks play a bigger role than many people expect. If your feet run hot or damp, friction rises quickly. Moisture-wicking materials and double layer construction can help manage this.
- Shop walking socks designed for moisture control
- Try double layer socks to shift friction away from the skin
- Learn more in 1000 Mile socks technology
Switching to anti blister walking socks can help reduce heel rubbing, especially when breaking in new boots.
3) Get the fit right at the heel
If your boot fits in length but your heel still lifts, you may need a different last shape, improved lacing, or an insole that helps secure the foot.
4) Add insoles to improve comfort and hold
Insoles can reduce shock at the heel and forefoot and can also improve fit if your boot feels slightly roomy.
See our shock absorbing insoles and read which walking boot insoles should I choose.
How to reduce blisters when walking
Heel problems get the attention, but long walks can also cause rubbing on toes, soles and the ball of the foot. These steps help reduce the main triggers:
- Check toe room so toes do not hit the front on descents
- Use moisture-wicking socks
- Avoid cotton for longer walks
- Keep lacing even to stop forward slide
- Take short breaks on very long walks if needed
Do different types of footwear cause blisters?
Yes. The root cause is still friction, but the trigger varies by footwear type.
Walking boots
Boots can cause problems if the heel lifts, the collar is stiff, or the fit is slightly off. Explore our walking boots and read the best walking boots and shoes to prevent blisters.
Walking shoes
Walking shoes feel lighter but can still rub if the heel cup does not hold securely. Browse our walking shoes range.
Work boots
Work boots often cause issues simply because you spend longer on your feet. Focus on fit, moisture control and cushioning if you notice rubbing during the working day.
Everyday shoes and dress shoes
Smart shoes can rub the back of the heel if the counter is firm or the shoe is slightly loose. Socks that stay in place and good heel hold usually solve most problems.
Quick blister prevention checklist
- Stop heel slip first
- Wear moisture-wicking socks
- Consider double layer socks for longer walks
- Use shock absorbing insoles if needed
- Check toe room and lacing before long days out
Original publish date: May 08, 2015
Last updated: February 24, 2026
Heel and Foot Blister FAQs
Stop heel lift first. Use heel lock lacing, choose socks that reduce slipping, and check boot fit at the heel. If needed, add an insole to improve hold and cushioning.
Reduce sliding at the heel. Wear socks that manage moisture and don’t slip, and choose footwear that holds the heel securely. Double layer socks can also help reduce rubbing.
Use well-fitted boots or shoes, wear moisture-wicking socks, and keep feet drier. Prevent sliding forward with even lacing and allow enough toe room for hills and descents.
Repeat blisters usually come from the same movement pattern: heel lift, socks slipping, damp skin, or footwear that doesn’t match your foot shape. Fix the movement first, then manage moisture and cushioning.
Related guides
Products That Help Reduce Foot Blisters
If you get blisters when walking, socks, insoles and properly fitted footwear can help reduce rubbing and improve comfort. Here are a few options to start with.