Some times it occurs seasonally (rainy and winter) or through out 365 days.
Happens when the immune system of the body becomes over sensitive to specific allergens in the environment example dust,pungent odours,pollen grains etc..which leads to sudden sneezing, watery eyes and nose,itching sensation of eyes/nose/ear/throat.
In some cases we find cough .....allergic type..long standing ....dont subside even after using so many medicines. Usually Children and old age group gets this type of cough.Homeopathy has the potential to treat long standing allergic cough.
First identify the cause,try to keep your self away from that.
Homoeopathy offers permanent relief from allergic rhinitis by boosting the immune system of the body.