From the SAYSO Trainer’s
Notebook
If the blister is small and closed, leave it alone and take steps to keep it from growing larger: stop practicing, change into different soccer boots, and cover the blister. If you can’t stop, protect the blister with a donut-shaped moleskin pad leaving the area over the blister open.
If the blister is larger than about an inch across, it is best to drain it. Sterilize a needle with alcohol. Puncture the blister and carefully press the fluid from it. Leave the skin intact; do not peel it off. Gently wash the area with soap and water. Gently smooth the flap of skin over the blister. Apply an antibiotic ointment and a sterile bandage. Do not use alcohol or iodine, as they will delay healing. Change the bandage once a day to reduce the chance of infection. Remove the bandage at night to let the area dry.
Call a medical provider if signs of infection (pain, swelling, redness, tenderness, pus, or fever) develop.