It's weird. I had a bad cough before going to Madrid. I was OK through Madrid, then came back and the cough started again.
My dad says it's too much dairy and sugar, but I had about the same amount of dairy stuff, and tons more sugary stuff when in Madrid (I drank a 2L bottle of an orange drink to myself. It had over 200% of the daily guidelines of sugar in it. After, I also drank some coke, some orange juice, and some Fanta, plus I got a hot chocolate with churros... Yeah, it was a sugary sweet day)