Sinus drainage can be allergy, bacterial sinusitis and even gastric reflux. Try OTC Loratidine or benedryl (stronger), If it does not clear up then it is not allergy and requires a trip to the doctor for diagnosis.
I Have Sinus Drainage In My Throat And I Would Like Answers To How To Get Rid Of This Without Going To The Pharmacy Or Doctor?
All alternative therapies/home therapies/phyto pharmaceuticals can take time to treat these conditions. Ginger extracts, peppermint oil, fennel, piper longum, Embelica and ephedra can be help full.