air-conditioner sick

Have you ever heard of the word "air-conditioner sick"?
Now my husband Yuki is suffering from it, and finally he took a sick-day. It is really unusual.
Last month he took a sick-day from summer cold (our grandmother brought it). He seldom takes such sick-days.
It means the heat of this summer is unusual, and our situation with our daughter and grand daughter is also unusual.

"Air-conditioner sick" seems to be used only in Japan. It is a particular syndrome in Japan.
According to Japanese Wikipedia,
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 Air-conditioner sick doesn't exist as one of illness in the medical world. However it is right many people in Japan  feel unwell including slight fever or headaches when they stay in the area where air conditioners work very well for long hours and after that they stay in a very hot sites, and they have to experiences such a temperature difference repeatedly.
The relationship of this bad shape and air conditioners is not clear scientifically . However in Japan many people are suffering from air-conditioner sick in summer. Japanese doctors use this term. Additionally this term isn't accepted in the world not standard.
Probably our thermoregulation immune system is different from others.
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Yuki said,
in Yuki's office, about half of Japanese workers wear long-sleeved uniforms on the other hand most of foreign workers (there are many foreign workers in his office) wear short-sleeved uniforms.

And he often heard that some people are suffering from air-conditioner sick, but never heard that foreign workers suffer from it.

Well, well, it is an additional thing.
The other day I had to kill time at a shopping mall while  our daughter and her granddaughter were  participating in a meeting. I forgot to bring my jacket. It was too cold to stay there without jacket. And fortunately many clothes were on sale. So I bought a new jacket.