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Transient tachypnea of the newborn (TTN), often referred to as "wet lung," is a common condition affecting newborns, particularly those who are delivered by cesarean section or are born prematurely. It is characterized by rapid breathing that usually arises shortly after birth due to retained lung fluid.

When no additional symptoms—such as oxygen requirement, retractions, or grunting—are present, TTN typically resolves spontaneously within a few days. This spontaneous resolution occurs as the fluid in the lungs is gradually reabsorbed and normal respiratory function is established. Most infants with TTN can maintain effective oxygenation and do not require invasive interventions, making observation and supportive care the primary management strategy.

In contrast, progressive worsening, the need for immediate interventions, or the development of chronic conditions are not typical outcomes for isolated cases of TTN without complications. Recognizing that TTN usually resolves without significant medical intervention helps reassure parents and caregivers during this transitional period for newborns.