Have a blister on foot and used band-aid antiseptic wash it now is burning swollen red hurting really bad. There closed blood blister. Could be serious?

It is possible that your infected blister could be serious, and it is important to seek medical attention if the pain, swelling, and redness persist or worsen.

Here are some things to consider:

- Infection: Blisters that become infected can cause significant pain, swelling, and redness. The area may also feel warm to the touch, and you may have a fever. If you suspect that your blister is infected, it is important to see a doctor as soon as possible.

- Closed blood blister: A closed blood blister is a blister that contains blood. These blisters can be more painful than regular blisters, and they may take longer to heal. In some cases, closed blood blisters can become infected.

- Serious complications: In rare cases, infected blisters can lead to serious complications, such as sepsis (a potentially life-threatening infection of the bloodstream), osteomyelitis (a bone infection), or gangrene (the death of tissue).

If you are experiencing severe pain, swelling, and redness around your blister, or if you have a fever, it is important to see a doctor right away. The doctor can assess the severity of the infection and prescribe antibiotics or other treatments if necessary.