Can Ophiopogon Root (McDoor) treat spontaneous sweating?
Ophiopogon japonicus (Mai Men Dong) can assist in alleviating spontaneous sweating to some extent, but its suitability depends on the specific underlying causes and individual body constitution. If uncertain, it is advisable to seek medical advice in advance. Detailed analysis is as follows:

Ophiopogon japonicus is slightly cold in nature and possesses functions of nourishing yin, moistening dryness, and promoting body fluid production to relieve thirst. It is suitable for spontaneous sweating caused by internal heat due to yin deficiency. If spontaneous sweating occurs mainly at night (commonly known as night sweats) or is accompanied by symptoms such as dry mouth and throat, appropriate use of Ophiopogon japonicus may help regulate the body's yin-yang balance, thus alleviating discomfort. Ophiopogon japonicus can be considered as an auxiliary调理 option, although it should be combined with other suitable herbs to enhance its effectiveness.
If spontaneous sweating is caused by qi deficiency or yang deficiency—for example, if symptoms such as cold intolerance and fatigue are prominent—Ophiopogon japonicus should not be used alone. Due to its cold nature, Ophiopogon japonicus might further impair yang energy, potentially worsening the condition or causing other discomforts. At this time, warming and nourishing herbs should be selected for regulation, rather than relying solely on Ophiopogon japonicus to relieve symptoms.
During the process of treating with traditional Chinese medicine, one should pay attention to bodily reactions, follow medical instructions to adjust medication, and avoid altering dosages or methods of administration independently in order to ensure safety and effectiveness.