It has not been shown that rubbing ginger on the scalp can cure gray hair.
The effects of ginger are warming and stopping vomiting (treating vomiting caused by stomach cold by warming the spleen and stomach), resolving phlegm and relieving cough, detoxifying fish and crab, and detoxifying the surface and dispersing cold (removing the cold from the surface of the muscle). This medicine is often used for fish and crab poisoning, cold phlegm and cough, wind-cold colds and flu, and vomiting caused by stomach cold, etc. It can be seen from its efficacy and effects that rubbing ginger on the scalp can’t cure gray hairs. The person who is hot and has a deficiency of internal heat should not take ginger.
The formation of gray hair is related to a variety of factors, such as genetics, nutritional deficiencies, etc., Chinese medicine believes that “kidney China in the hair”, “hair for the rest of the blood”, the formation of gray hair pathology and blood deficiency and kidney loss, in addition to the blood may also be associated with blood heat, labor injuries to the heart and spleen, and so on.
If it is caused by pathological reasons, patients can be based on their own specific diseases, under the guidance of traditional Chinese medicine practitioners to identify the evidence of treatment.