For those looking for a scientific explanation for their condition: this way please! Otherwise is now a small collection of more or less useful tips.
Drinking: a lot! The best non-carbonated water or Kräuertee.
showers: absolutely! And hot!
Eating: sour (pickled herring, cucumber, whatever), salty and greasy. Is very suitable broth without supplements. For this purpose a toast without anything.
air: just fresh. The smog makes it worse at home, really.
well soon and see you next time! They were wonderful!