What Is Reverse Altitude Sickness?

https://outdoorsfaqs.com/what-is-reverse-altitude-sickness/
High altitude de-acclimatization syndrome, or reverse altitude sickness may develop when you return home after a long period of living at a high elevation. It is real and it includes a number of symptoms. These can be headache, fatigue, insomnia, sleepiness, abdominal pain, insomnia, cough, throat pain, chest tightness, and even memory loss.