I feel sick as soon as I return from a pleasant trip abroad.

As soon as I returned from a pleasant trip abroad, I suddenly felt a scratchy throat and a runny nose, making it really difficult to concentrate on daily life.

I'm worried that my immune system may have weakened rapidly due to the long exposure to dry air on the plane and the tight schedule at my travel destination, which has left me very tired.

I'm worried that it might be a simple seasonal cold or another illness prevalent at the travel destination. Does anyone who, like me, has had trouble feeling unwell right after traveling know any resting methods or good foods to eat to help them recover quickly?

I recently returned from an overseas trip and my sore throat and runny nose have gotten worse, probably due to accumulated fatigue. I'm curious about specific ways to boost my immunity and recover quickly.