All About Blister Plasters

All About Blister Plasters
15 August 2022

All About Blister Plasters

Blisters are areas of raised skin with a small pocket of liquid trapped inside. They form when the epidermis (the outer layer of skin) separates from the skin layers beneath. Blisters form on the hands and feet due to continuous pressure or rubbing, most frequently caused by new, uncomfortable, or ill-fitting shoes or repetitive motion.

Woman rubbing Blister on heel

Blister plasters are a popular and effective product to use to either prevent blisters from forming or treat them. With such a wide range of plasters to choose from, we will unpack why you should use specially formulated blister plasters rather than regular plasters for the best results. 

This article will discuss some of the most common questions about blister plaster use, including: How do blister plasters work? What do blister plasters do? Should I put a plaster on a blister? And explain how to apply blister plasters so they are effective.

Can you put a plaster on a blister?

Many people wonder “can you put normal plasters on blisters?” And “should you put plasters on blisters?” The simple answer is yes.

Putting a regular fabric plaster or a washproof hypoallergenic plaster on a blister will offer some benefits and form a protective layer between the blister site and your shoes. Our specially designed blister foam plasters have an extra layer of foam padding over the dressing pad to make a thicker, protective layer, too. These are ideal for products to wear with new or uncomfortable shoes as a preventative measure to reduce the risk of blisters forming in the first place.

Feet walking on a wooden deck

When a blister has formed due to repetitive contact and rubbing, our scientifically formulated cushioned blister plasters are the ideal way to prevent and treat blisters. Similarly to the blister foam plasters, you should put a hydrocolloid blister plaster on at the first sign of rubbing to protect the area and prevent a blister from forming. Our blister plasters are designed with hydrocolloid technology to protect you from rubbing, pressure, and impact and to help the body’s natural healing process. Their size and shape mould around the area of the blister, usually the heel of the foot. They are made from a durable, flexible material that moves and stretches with your skin so it will stay in place while the blister heals, acting like a second skin.

The strong adhesive border of blister plasters is designed to stay in place for several days to create a protective barrier against dirt and bacteria, preventing the blister from becoming infected. The hydrocolloid pad, sealed over securely, helps to create a moist healing environment due to its high water content, this helps the blister healer faster.

So, choose hydrocolloid blister plasters to protect sensitive areas from blisters, or put them over formed blisters to aid healing. If you’re wondering: can I put a blister plaster on a burst blister? And can you put blister plasters on broken skin? Yes, if your blister has burst, a blister plaster will protect the open skin from bacteria and germs, creating a humid environment that will encourage new cell growth and promote the natural healing process.

Can you use blister plasters on open wounds?

So, you can use regular plasters on a blister when you don’t have access to a hydrocolloid blister plaster, but can you use blister plasters on cuts or open wounds?

If you’re referring to a burst bluster as an open wound, then yes. Use a blister plaster on a blister before it’s formed, or at any time after it has appeared, even if it’s popped and the fluid inside has come out.

However, for a cut, graze, or open wound, use a standard plaster such as hypoallergenic washproof plasters or stretchy fabric plasters to cover and protect the area. For a larger wound, make sure to clean the area and dress it with a wound dressing or plaster strip that you can cut to the correct size.

How do blister plasters work?

So, “what do blister plasters do and how do they work?

The hydrocolloid layer that covers the blister area absorbs exudate, meaning that it is the ideal, clean area for the blister to heal while the fluid under the blister’s skin is absorbed and the swelling is reduced. 

Man applying blister plaster on the back of ankle

Why has my blister plaster gone white?

If you’ve used a hydrocolloid blister plaster before, you may have seen that the blister area appears to change colour and turn to a white-ish colour. But why do blister plasters go white?

Don’t worry, if a white colour forms underneath the hydrocolloid layer, this is simply a sign that the plaster is doing its job and healing is taking place. The white patch is simply the excess fluid from inside the blister that has been absorbed into the hydrocolloid layer.

Instructions: How to apply blister plasters

Follow these instructions, so you know how to use blister plasters safely and effectively.

  1. Ensure the area is clean and dry before applying the plaster.
  2. Remove the hydrocolloid blister plaster from its protective pouch.
  3. Peel away the paper pieces numbered one and two to expose the adhesive layer. Make sure not to touch the adhesive layer with your fingers.
  4. Apply the plaster directly over the blister. The hydrocolloid layer should cover the blister site completely.
  5. Ensure that all the adhesive edges are stuck to the skin and are fully sealed to protect the blister.
  6. Remove the piece of backing paper, numbered three, by lifting the white tabs from the middle of the plaster.
  7. Keep an eye on your blister plaster and replace it when needed.


  • Do not intentionally burst the blister.
  • If the blister becomes reddened, swollen or painful underneath the hydrocolloid layer, remove it and seek medical advice.
  • Do not use a blister plaster if the packaging is damaged.
  • Blister plasters are single-use only. Once removed, dispose of the plaster safely.
  • Store hydrocolloid blister plasters in a cool, dry place away from direct sunlight.

How long to leave a blister plaster on:

After application, you might be wondering how long do blister plasters take to work, how long should you leave blister plasters on for, and how often should you change blister plasters?

This will depend on your blister, its seriousness, and how long your natural healing process takes. The best way to tell if your blister plaster is ready to remove is if:

  • You can see the white patch has formed, and liquid has been absorbed.
  • There is a visible space between the hydrocolloid layer and the skin, meaning swelling has reduced.
  • If the adhesive edges are starting to come loose and be less adhesive.

These signs mean that the blister plaster has done its job and it’s ready to remove. 

How to remove blister plasters

In terms of how to get a blister plaster off safely, ensure you have clean hands and gently pull away the adhesive from one side, slowly taking care not to re-open the healing wound.

If you have accidentally reopened the blister wound and can see any liquid coming out, dry the area with a clean tissue and apply a fresh hydrocolloid blister plaster, repeating the process.

Can you use blister plasters on acne?

You might have heard about the viral craze for using blister plasters to treat acne. We cover everything you need to know about it on our blog. 

In short, the hydrocolloid agent in some blister plasters can help to heal spots and manage acne. Hydrocolloids work by drawing fluids and exudate out of the skin. Putting blister plasters over spots can effectively reduce the appearance of pimples and shorten their life cycle, but only if they contain a hydrocolloid. 

We stock hydrocolloid blister plasters as part of our wide range of plasters and dressings. They have been formulated to treat burns and scalds but can also help to treat acne due to a hydrocolloid active ingredient they contain. Hydrocolloid blister plasters like ours have some absorbing properties as well as the ability to create a moist healing environment.

Blister Plasters: Where to buy

Now that you know how blister plasters work, it’s important that you choose the right product. Steroplast’s Cushioned Blister Plasters are the best plasters for heel blisters, and blisters underfoot, over toes, or along the sides of the foot.

We also stock blister foam plasters that will help you to prevent blisters from forming in areas that are likely to be rubbed such as form a protective cushion between the irritated skin and an uncomfortable shoe. 

Are you a pharmacist looking for blister plasters to stock? Contact us today and order a sample pack to test out in your retail unit.

We’re experts in the areas of first aid and wound treatment. Check out our full range of plaster retail packs. We help shop owners stock their whole first aid section with ease. Buy plasters in bulk here, all packaged up and ready to go on the shelf.

Looking to stock up on plasters for the family? Our Family Plasters Bundle provides everything you need to treat cuts, blisters, and grazes at home. 

Our B2B products are ideal for the healthcare supply chain and businesses that need a constant stock of plasters and dressings. Buy from us for highly customised orders to meet your exact requirements. We supply plasters in many different shapes, sizes, and quantities. 

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