What is the role and efficacy of Chinese medicine Amomum villosum?

Chinese medicine Amomum villosum has the effect of warming middle part, stopping diarrhea and calming fetus. It can be used to treat abdominal distension caused by cold and dampness, qi stagnation of spleen and stomach, and vomiting and diarrhea caused by spleen and stomach deficiency. In addition, it also has a good therapeutic effect on fetal restlessness.