Is this an ongoing problem or do you have a cold or something of the like? If it's ongoing I would suggest going to the Doctor and seeing what they will tell you because it may be due to allergies or something.
Otherwise, if it's just a cold then I'm afraid there isn't much else to do other than over the counter drugs and tissues. Sorry I couldn't be of any more help!
Um u can't. All u can do that isn't 4 sure gonna stop it is breath in with ur nose and out with ur mouth and put tissue in ur nose. :| :) :D