Locate the air bubble inside of your mattress. For the majority of air bubbles, you will be able to find it immediately.
Place a hand on the air bubble. Apply a small amount of pressure to attempt to pop the bubble.
Open the nozzle and allow the air to begin to escape from the air mattress. As the mattress is deflating, continue to apply pressure to the air bubble until it pops.
Attach the air pump to the air mattress as soon as the bubble pops and refill the mattress with air. Once filled, detach the air pump and close the air nozzle on the mattress.