Headache and dizziness after taking ginseng should stop taking ginseng immediately. Common causes are overdose, hot body people taking it, and allergic people taking it. It should be taken under the guidance of a doctor. 1. Overdosage: Since ginseng replenishes the vital energy (replenishes the root energy of the body), restores the pulse and fixes the dizziness (restores the normal pulse and prevents the substance from coming out), a single large amount of ginseng may cause headache and dizziness, and then ginseng should be stopped temporarily, and a doctor should synthesize the situation to determine whether it is possible to take ginseng again. If ginseng can be taken again, attention should be paid to the dosage and usage of ginseng. 2. Ginseng for people with hot constitution: Ginseng is slightly warm in nature, and people with hot constitution usually have strong fire, so they may have headache and dizziness when taking ginseng. This kind of people are not recommended to take ginseng again, but can choose alternative medicine after doctor’s diagnosis. 3. People who are allergic to ginseng: If they are allergic to ginseng, they may have headache and dizziness after taking ginseng. Therefore, this kind of people should stop using ginseng in time, and the doctor should choose the suitable medication after integrating various situations. It should be reminded that ginseng should not be used together with quinine and wulin. In addition, ginseng should be taken under the guidance of doctor’s diagnosis, do not use ginseng blindly on your own to avoid adverse reactions.