A seriously infected blister – particularly a swollen blister with pus – can lead to potentially life-threatening conditions including septic shock, which happens when certain chemicals released by your immune system trigger a chain reaction in your body. In order to avoid such complications, it’s best to visit the doctor as soon as possible. If you see red lines radiating from your wound at any time, go to the emergency room immediately.
You should also visit your doctor immediately if you experience the following:
- Body aches and/or pains
- The blister is showing no sign of healing.
Finally, if a blister forms on a person who is diabetic, pregnant or a child, seek medical advice before treatment, regardless of the size or occurrence of the blister.
All in all, a bit of swelling shouldn’t trouble you, but you should always monitor an infected blister in case complications arise.