Jala Neti is a yogic technique to clean your sinuses. Neti is one of the six purification methods in Hatha Yoga. The sinus cavities can get clogged with impurities which may cause infections, inflammations and headaches.
Sutra Neti is a Hatha yoga technique to clean your nasal cavity. Sutra Neti is one of the six methods of purification or Shatkarma as given in the yogic text Hatha Yoga Pradeepika. There are various types of Neti practiced by Yogis including Jala Neti (with water), Dughda Neti (with Milk), Sutra Neti (with cotton string), etc. In Sutra Neti, a waxed cotton string is traditionally used to clean the nasal cavity.