Popped blister because the infection was starting. The blister is closing up and expanding. It's red but still expanding. What can I put on it?

It is recommended to clean the wound with soap and water, apply an antiseptic ointment, cover it with a sterile bandage, and keep it clean and dry. If the redness and swelling continue to worsen, it is important to seek medical attention from a healthcare professional for further evaluation and treatment.