I suffer from bad seasonal allergies and have had quite a bit of congestion and post nasal drip so i gave neilmed sinus spray a try. i used bottled water. warmed it up. used the salt formula. ive had a terrible headache ever since. why?

Don't give up: Nasal passages and sinus cavities can become filled with fluid and cause sinus pressure headaches. Saline nasal washes work by washing out particulates, bacteria etc from the nasal passages/ sinus areas. It is important not to give up the saline washes because of the headache. Try a nasal decongestant to relieve the pressure. Once the inflammation goes down, the nasal washes will keep you healthy