The information provided here is not a replacement for a doctor. You shouldn't use it for the purpose of self-diagnosing or self-medicating but rather so you can have a more informed discussion with a professional TCM practitioner.
It is a type of the Painful Obstruction Syndrome (Bi Syndrome 痹证).
When Pernicious Influences such as Wind, Damp or Cold penetrates the Defensive Qi and obstructs the Channels, they disturb the normal Qi and Blood circulation of the Channels and give rise to pain and swollen.
If the patients happens to have Yang Excess or Yin Deficiency, the excessive Interior Heat then gets combined with the external Wind, Damp or Cold and transforms to Exterior Heat, which then settles down in the joints.
The manifestation of the Heat are the red and hot joints in additional to pain, stiffness and swollen. The conditions often happen in several joints instead of a single local area. The patients also experience other symptoms such as thirst or anxiety.
'Heat' as a body pattern in Chinese Medicine is one of the so-called "Eight Principles". Learn more about Heat pattern in Chinese Medicine
Pulse type(s): Rapid (Shu) or slippery (Hua)
Tongue description: Red tongue with yellow and dry coating
Diagnosing a pattern in Chinese Medicine is no easy feat and should be left to professional practitioners.
In particular one has to know how to differentiate between different types of pulses and tongue coatings, shapes and colors. Here patients with Heat invading the Channels joints and muscles will tend to exhibit rapid (Shu) or slippery (Hua) pulses.
Practitioners also learn to read from a long list of seemingly unrelated symptoms. Here patients with Heat invading the Channels joints and muscles might experience symptoms like joints pain, joints red and hot, fever and thirst (full list here above).
Source date: 1798 AD
Number of ingredients: 9 herbs
Key actions: Clears and resolves Damp-Heat. Unblocks the meridians. Disbands painful obstruction.
Xuan Bi Tang is a 9-ingredient Chinese Medicine formula with Stephania Roots (Fang Ji) as a principal ingredient. Invented in 1798 AD, it belongs to the category of formulas that dispel Wind-Damp.
Besides Heat invading the Channels joints and muscles, Xuan Bi Tang is also used to treat Painful Obstruction due to Damp Heat in Channels.