It's fun to travel. But being away from our usual eating and sleeping routines can make it more likely for someone to get sick. It takes time to adjust to the food, water, and air in a new environment. And kids can be at risk for travel-related problems like motion sickness, diarrhea, and infections.

It is extremely common for children to experience illness during or after travel, a phenomenon often caused by exposure to new germs and a disruption of their routine. When traveling, kids interact with high-touch surfaces in airports, planes, and hotels, encountering viruses their immune systems may not have met before. Common issues include gastroenteritis (stomach flu) from unfamiliar food or water, and respiratory infections from recycled cabin air or crowded tourist sites. Additionally, "travel fatigue"—caused by irregular sleep schedules and the physical stress of changing time zones—can weaken a child's immune response, making them more susceptible to catching a cold. Motion sickness and "swimmer's ear" are also frequent culprits. In 2026, pediatricians recommend maintaining a strict hand-washing routine and ensuring kids stay hydrated with bottled water in unfamiliar regions. While most travel-related illnesses are minor and pass within a few days, the combination of environmental changes and a lack of routine makes a "post-vacation cold" a very standard experience for many families.