Why do I receive sinus stomach-ache at darkness contained by the summer?

It's not every night only mostly happens at dark and in summerWhy do I receive sinus stomach-ache at darkness contained by the summer?
Humidity and temp fluctuations. Cools at dark and weather changes can fool next to your head. I seize them a lot. More surrounded by summer than any time else.
Allergies , i am having equal problem
Thats when most people are tired and you may hold alergies that are kicking in at that point. I enjoy the exact same thing as you and since my dr put my on a spray (I have headachs and sinus pain for over 6 months earlier I went to the Dr.). But presently Im doing much better now.