 [ Symptoms ] after giving birth i have pain during intercourse had first degree tear during birth [ Disease ] no the drainage from the sinuses is quickly contaminated from nasal mouth and throat germs so you cannot diagnose sinusitis by this method sinusitis is typically diagnosed by an array of characteristic symptoms sinus pressure pain coupled with corresponding examination findings tenderness decreased light with transillumination   shining a bright light into the sinus area in a darkened room or by x ray or ct scan findings most cases of sinusitis are viral and will be self limiting but some require antibiotics or allergy mangement see your medical provider