Ginger is kaempferia, kaempferia as a medicinal herb can not be used as a substitute for ginger, the two main treatment efficacy is different, should be used in accordance with medical advice.
Ginger is the nickname of Kaempferia, Kaempferia has the efficacy of warming the middle and moving qi, relieving pain, eliminating food, used for cold pain in the epigastric region (the stomach and abdomen feel cold pain), chest and abdomen distension, dietary intolerance, cold and dampness caused by vomiting and diarrhea, wind-dampness paralysis, and so on. It is not recommended to take this product if there is fire in the stomach, or if there is deficiency of yin and blood.
Ginger has the effect of dispersing cold, relieving cold, relieving cough and phlegm, stopping vomiting, warming the middle and relieving fish and crab poisoning, used for vomiting with cold stomach, wind-cold cold, fish and crab poisoning, cold phlegm and cough.
The efficacy of crabapple and ginger are different, so crabapple can not be used as a substitute for ginger. It is a good idea to use it under the guidance of a doctor, but not blindly.