郁金，中药名。为姜科植物温郁金Curcuma rcenyujin Y，H. Chenet C.Ling、姜黄Curcuma longaL.、广西莪术Curcumakwangsiensis S.G.Lee et C.F.Liang或蓬莪术Curcuma pha eocaulis Val.的干燥块根。前两者分别习称“温郁金”和“黄丝郁金”，其余按性状不同习称“桂郁金”或“绿丝郁金”。冬季茎叶枯萎后采挖，除去泥沙和细根，蒸或煮至透心，干燥
【Property】Spicy, Bitter, and Cold; Liver, Heart and Lung meridian
【common function】Promotes qi to remove blood stasis, clears the heart and relieves depression, promotes gallbladder and reduces yellowness.
Curcumae Radix (Yujin) has been widely used to treat Qi stagnation due to Liver depression (LDQS) in traditional Chinese medicine (TCM) for a long time and is good at dispelling melancholy by soothing liver to regulate qi and relieving pain by promoting blood circulation for removing blood stasis. Yujin stir-frying with vinegar can strengthen the effect of dispersing stagnated hepatoqi to stop pain by injecting medicine into the liver and stir-frying with wine can strengthen the effect of promoting blood circulation for removing blood stasis. Because the reason for the enhancement of clinical efficacy by processing is unclear, it is difficult to select and use processed products in the clinic.