You cool the burn with water for about 20 minutes. You do not open the blisters or pull off clothing stuck to the burn, so that it does not get infected. You simply cover it with a sterile napkin without bandaging, because pressure would cause extra pain and damage.
For superficial heat burns, the right first aid is to cool the burned surface with water for about 20 minutes, to prevent further damage to the tissues. Then the area should be covered loosely with a sterile napkin, leaving the blisters intact and not pulling off stuck clothing, to avoid infection and further injury. Giving the victim water to drink helps prevent dehydration.
Option 1. A tight bandage presses on the damaged skin, causing severe pain and further tissue damage.
Option 2. Opening the blisters or pulling off stuck clothing increases the risk of infection and damages the sensitive tissue underneath.