Magnolia Flower Bud Classic Formulas

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Disperses wind-cold from the upper burner and opens the nasal passages - Xin Yi is one of the classic herbs for stubborn nasal obstruction with frontal headache, reduced smell, and turbid sinus discharge.
Reduces sinus swelling and unblocks the orifices - it is especially valued when congestion is lodged deep in the sinuses rather than only in the throat or exterior.
Relieves headache related to blocked nasal passages - traditional use often targets brow-line pain, sinus pressure, and heaviness of the head caused by retained wind-cold or wind-heat.

Cang Er Zi San - classic combination with Cang Er Zi, Bai Zhi, and Bo He for rhinitis, sinus congestion, and sinus headache.
Xin Yi San - traditional nasal-opening strategy for chronic obstruction, reduced smell, and lingering sinus blockage.
Bi Yuan Wan and related sinus formulas - use Xin Yi when thick discharge, frontal pressure, and blocked breathing through the nose dominate the picture.

Traditional materia medica place Xin Yi among warm, acrid herbs that expel external pathogens from the head and specifically open the nose.
Modern classroom teaching emphasizes that its true niche is fixed obstruction and sinus pain rather than broad exterior release on its own.
It is generally used in small doses within formulas because its action is strongly upward and focused on the nasal passages.