There are several reasons why dizziness occurs with weight loss: 1. It is caused by hypoglycemia. Many people lose weight by limiting staple foods and restricting the intake of sugary foods, which can lead to dizziness and other phenomena due to hypoglycemia in the body. At the same time, the patient will also appear fatigue, sweating and other phenomena. 2, weight loss dizziness may also be caused by lower blood pressure. When you lose weight, you have to limit some highly nutritious foods. This will lead to low blood pressure in the long run, such as limiting the intake of high quality protein foods will lead to lower blood pressure and dizziness due to ischemia in the brain. 3, weight loss dizziness may also be caused by substandard weight loss drugs or supplements. Many weight loss drugs and health care products are not qualified, and some ingredients can cause side effects, which can lead to brain nerve stimulation symptoms and dizziness.