My son 21 yrs , 6 ft height , 72 kg wt is good in health but whenever there is small seasonal change everyday he got Morning sneezing and runny noise when he wake in morning from Bed . It remains for 1-2 hours in morning and afterwards no issue during entire day . It happens almost 4-5 times in a year and remains for 10-12 days when it happens Kindly advise permanent cure or some precaution/ prevention when he goes for sleep as when he wake he got it . He don't have any kind of other health issues .