Chances are you’ve had a blister before – whether at the back of your heel from a too-tight shoe, or on your lip when you’re feeling run down. It can be tempting to pop it to try and reduce some of the pain and pressure – but is this the right thing to do? Read on to find out.
Why does a blister form?
There are many different reasons that blisters form, explains Dr Nokubonga Khoza, a specialist dermatologist in Durban. From infections (viral, fungal, bacterial or parasitic), to trauma (burns or chafing), inflammatory and autoimmune diseases, the list of causes of blisters is seemingly unending.
Some of the more common causes are listed below:
- Friction
- Extreme temperatures
- Contact dermatitis (touching something you’re allergic to, or is poisonous)
- Insect bites
- Viruses – eg. Chickenpox and shingles
- Fever blisters (Herpes simplex)
A blister forms when fluid accumulates under the skin.
Should you pop a blister?
The short answer is “no”. Most experts advise against popping blisters as you risk opening the wound to secondary infection. Depending on the cause of the blister, you can also spread an existing infection. “With viral blisters, the virus is in the fluid,” says Dr Khoza. “Always get assistance from an expert,” she advises.
How to treat a popped blister
If a blister is popped accidentally, clean it with warm water and antiseptic ointment as soon as possible. Wrap the area with sterile gauze, and keep a close eye on it for signs of infection, such as pus, red streaks leading away from the blister, or fever. If any of these indications present, seek medical advice immediately.
How to treat an infected blister
When you are not clear on the cause of a blister, or it requires medication – such as with fever blisters, chicken pox or shingles – it is also best to consult with a medical professional. “There is an extensive list of things that could cause blisters,” cautions Dr Khoza, noting that they can indicate more serious issues.
What is the best way to prevent blisters?
“Treat any inflammation as early as possible,” advises Dr Khoza. In the instance of sunburn or friction blisters, get treatment before the skin gets to the blistering stage. Protective gear such as work gloves can help against friction blisters, and if shoes are causing chafing, break them in gradually or put a Band-Aid in the area that is being rubbed. For fever blisters, eat a healthy, varied diet, limit exposure to sunlight and keep hydrated.
Also read: What you need to know about adult acne
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