Frühlingsmüdigkeit = spring tiredness. THAT DOES NOT EXIST.
This reminds me of a malady that seems to strike only within French borders: << les jambes loudres >> = "heavy legs."
I had a good laugh about it with some friends from Paris. Apparently, you can only catch it in France, as there have been no epidemics reported in England, Spain or Germany! You can, however, get creams, and a sympathetic ear, for heavy legs at every "chemist" in Paris. It's hilarious!
I do love their approach to medicine. You have a chest cold? Here's an order for an x-ray, wrap this scarf around your neck, here are 7 prescriptions, and a note to give to your boss telling the company you must have 4 weeks of bed rest. They're wonderful!