Dizziness caused by weight loss may be caused by transient hypoglycemia and anemia, which should promptly stop exercise, use sugary foods or oral glucose solution, pay attention to rest, and go to the hospital for examination. Weight loss due to reduced intake of staple foods, sugar isomerization pathway increases, resulting in the conversion of body fat, protein, may cause blood sugar instability, causing dizziness, should promptly stop exercise, supplement sugary foods or glucose solution, daily attention to balanced nutrition, moderate increase in staple foods or low-sugar fruits, moderate exercise. Anemia caused by dizziness need to go to the hospital in a timely manner, due to diet during weight loss is too restrained, poor nutritional intake, the phenomenon of anemia, the light through the dietary regulation, the heavier need medication. Weight loss should vary according to individual constitution, dizziness symptoms do not ease should be timely consultation, under the guidance of the doctor for treatment.