spring
HI PND IS USUALLY CAUSED FROM ALLERGIES. THICK MUCAS,KIND OF JUST SITTING IN BACK OF THROAT, CLEARING YOUR THROAT ALOT WITH NO REIEF? DRINKING LOTS OF WATER HELPS. ALSO ROBITUSSIN, FOUND ON THE SHELF OF ANY DRUG STORE, CONTAINS "GUIENIFISIN" (SPELLED WRONG) IT HELPS IN THINNING OUT THE MUCAS DRAINAGE. HOPE THIS HELPS.