Excess Yin is a Full Yin state pattern. It creates Cold symptoms which are similar to these of Yang Deficiency, such as feeling of cold, cold limbs, profuse but clear urination, pain that gets worse by pressure but relieved by warmth. It is because Yin is cooling in nature and the excessive occurrence of Yin extinguish the Yang fires.

The Cold here mainly refers to Wind-Cold and Damp-Cold. They can invade the Interior Organs directly such as the Stomach, Large and Small Intestines and Uterus. They can also invade the Exterior and cause painful obstruction syndrome like Wind, Cold or Dampness invading the Channels, joints and muscles.

When Yin becomes in Excess, this can lead to Body Fluids accumulating in the body and form Dampness or Phlegm. They may built up throughout the body, giving a general appearance of swelling and heaviness, or they may collect in a particular area of the body. For example, if they are in the abdomen, nausea and vomiting appears. If in the Lungs, cough with copious clear mucus occurs.

Then stagnated Dampness may also turn to Heat, and a general hypoactivity of Organ functions appears.