Hello!
climet change is very commen these day,in flactuating climate our body homeostate balance all the changes but due to our improper diet and lifestyle homeostate is not working properly and we fall seek easly.To maintain the good health once should take only the sesonal fruit and vegitable.do pranayam every day specially kapalbhati,
Anulomevilome pranayam
Sitli and Sitkari pranayam .
surynamskar ,these all healp you to improve you oxygen intake in your body .and keep your lymphatic system active to fight from the external agent.
Take Giloy(herbal medicine) every day to increase your immunity.dont take curd in night.