What should I do if I get blisters on my feet from running?

Blisters on the feet caused by running can be managed according to their size, using appropriate measures such as avoiding friction and irritation, applying ice packs, or medical treatments.

1. Small blisters

If the blister is small (diameter <1 cm), no special treatment is required; it can be left to be reabsorbed naturally. Do not break the blister to avoid infection. Promptly switch to comfortable, breathable footwear, rest more, reduce walking, and avoid further friction on the blistered area to prevent worsening. If the blister causes significant foot pain, apply an ice pack or cold compress for 5–15 minutes to help constrict blood vessels, reduce surrounding pain, and achieve anti-inflammatory and swelling-reducing effects.

2. Large blisters

Very small blisters, such as those the size of a grain of rice, typically resolve on their own. However, if the blister is large—resembling the size of a grape—the body may not adequately absorb it. In such cases, after disinfecting the area, a sterile syringe can be used to aspirate the fluid. After puncturing, disinfect the site with iodophor and, as directed by a healthcare provider, apply antibiotic ointments such as erythromycin ointment or mupirocin ointment to prevent infection.

After developing blisters from running, avoid prolonged running, allow adequate rest, wear properly fitting and comfortable shoes and socks, and maintain good foot hygiene. Small blisters usually require no intervention and will gradually resolve spontaneously. If blisters are very large, rupture, or show signs of infection, it is recommended to seek medical care for proper treatment.