I have constant fleming, what should i use?

Phlegm : I take it that you mean ,phlegm, I would try Mucinex which is over the counter. Good Luck

Phlegm: Excessive,thickish phlegm can be caused by very dry environment from heating or air conditioning, postnasal drip from allergies, chronic sinusitis or actual nasosinusitis due to a head cold. If you don't think you have an active infection,then add a humidifier if you run heating or air conditioning. Take a mucolytic agent like mucinex. To relieve nasal congestion and allergies try Sudafed,claritin