Foot blisters
A foot blister is a pocket of fluid that forms when friction and heat damage the outer layer of your skin, most often from shoes or socks rubbing during activity. Properly fitted footwear, moisture-wicking socks and reducing friction can help prevent them. Fiona Shepes assesses blisters and their causes in an initial consultation from $100 at The Fresh Foot Centre in Narre Warren.
What a blister is
A blister is a raised pocket of fluid that forms within the outer layers of your skin. Friction and rubbing between your skin and your sock or shoe create shearing forces that weaken the bonds between skin cells. Heat and moisture around the foot add to this breakdown. Most foot blisters are filled with clear fluid and sit on areas that take the most pressure, such as the toes, forefoot and heel.
Symptoms
You may notice a range of signs before or after a blister appears.
- A warm, tender "hot spot" on the skin before the blister forms
- A raised bubble of clear fluid on the toes, forefoot or heel
- Redness and soreness around the blister
- Pain when the shoe or sock presses on the area
- Fluid or raw skin if the blister breaks
Causes and risk factors
Friction and torque during activity generate shearing forces between the skin and the sock or shoe surface. Repeated rubbing weakens the skin until a blister forms. Poorly fitting shoes and socks are the main cause, whether too tight or too loose. Tight socks can bind the toes, while loose socks wrinkle and pinch the skin. Heat and moisture add to the problem, particularly in warm weather when sweat builds up around the foot. Prominent seams inside a shoe, abrupt fabric edges or stitching can all create a hot spot. Dehydrated skin breaks down sooner, so athletes who train in the heat are at higher risk.
Treatment at the clinic
Treatment depends on the size, location and state of the blister, so Fiona begins with an assessment and diagnosis in an initial consultation from $100, or a standard consultation from $90. She can reduce corns and callus around pressure points, apply strapping and taping to protect a blister while it heals, and give footwear advice on the shoes and socks that suit your feet. Custom orthotics may be an option when foot shape or walking pattern contributes to repeated blisters, from $650 including a biomechanical assessment, fitting and a review appointment. Fiona can refer you back to your GP or for an X-ray, ultrasound or MRI when needed.
Looking after it at home
Choose your footwear and socks carefully, because the first defence against friction blisters is a proper fit. Socks that wick moisture away from the skin, with padding over the toes, forefoot and heel, can reduce rubbing, and toe socks can help when blisters form between the toes. Inspect new shoes inside and out for prominent seams, stitching or fabric edges that could create hot spots. Keep your skin hydrated, as well hydrated skin tolerates more stress before breaking down, and avoid dehydration when training in warm weather.
When to see a podiatrist
You should see a podiatrist when a blister keeps coming back, keeps you off your feet, or when a broken blister looks infected or slow to heal. Blisters that recur in the same spot often point to a footwear or foot shape problem that Fiona can assess. See a GP urgently instead when the blister is infected with spreading redness, you have a fever, or you have diabetes and any new wound or ulcer on your foot. People with diabetes should have their feet checked regularly, which Fiona does as part of her diabetic foot care.
Questions
Should I pop a blister on my foot?
Popping a blister at home raises the risk of infection, so it is generally best left intact. The fluid inside protects the raw skin underneath while it heals. Fiona can assess and dress a blister that is large, painful or already broken.
How long do foot blisters take to heal?
Healing time varies with the size and location of the blister and whether it has broken. Protecting the area from further friction with taping and the right footwear supports healing. Fiona can advise on protecting the blister during activity.
How do I stop getting blisters when I walk or run?
Start with properly fitted shoes and socks, including moisture-wicking or padded designs, and check new shoes for prominent seams or stitching. Keep the skin hydrated and address hot spots early before they become blisters. A biomechanical assessment can identify foot shape or walking patterns behind repeated blisters.