It is generally best not to pop a blister because the fluid inside protects the underlying skin and helps it heal. However, if a blister is very large, painful, or in a place where it is likely to rupture on its own, it may be safer to pop it carefully to avoid infection. If you do decide to pop a blister, it should be done safely by:
- Washing your hands and disinfecting the blister area.
- Sterilizing a needle with alcohol, then gently puncturing the edge of the blister to drain fluid while keeping the skin intact.
- Applying an antibiotic ointment like petroleum jelly, then covering the blister with a clean bandage.
- Monitoring for signs of infection like pus, increasing redness, warmth, or swelling.
Avoid popping fever blisters (cold sores) because they are caused by a virus and popping can spread the infection. Leaving blisters intact when possible results in faster healing and minimizes infection risk, but in some cases careful drainage is advised to reduce discomfort and prevent spontaneous, unsanitary rupture.
