Peroxide bubbles do not mean an infection.
The bubbles or fizzing from the peroxide is just simply a natural chemical reaction that is caused by an enzyme that is called catalase, which is present in blood and most living human cells.
When the hydrogen peroxide touches the damaged tissue, it releases oxygen gas, which creates the bubbles.
Also the bubbling with the hydrogen peroxide will also happen whether your wound is infected or not infected.
Hydrogen peroxide can also destroy healthy skin cells and delay the overall healing process, although the hydrogen peroxide does kill off bacteria.
If you notice any physical symptoms there could be an infection.
The signs of a possible wound infection include.
Worsening pain.
Pus or cloudy drainage.
Swelling and warmth to the touch.
And increasing redness or red streaks that spread outward.
If you notice these signs of infection or you have a fever or develop a fever, you should see a doctor or go to urgent care.
Although most wounds that are not too severe or infected will heal on their own with at home treatment.
But more severe wounds should be seen by a doctor.
Or if the wound is large enough or is bleeding and not stopping, then you may need stitches to fix it.