Dizziness and weakness are more common clinically and have more causes, the most common causes are as follows: 1, hypoglycemia: hypoglycemia is mainly caused by irregular diet or application of hypoglycemic drugs, in addition to dizziness and weakness, patients can also be accompanied by panic, sweating, hunger, blackness in front of the eyes, check fingertip blood sugar can quickly clarify the cause; 2, anemia: in addition to dizziness and weakness, patients can also have panic, chest tightness, shortness of breath The patient may have dizziness, weakness, pallor, low red blood cell count and reduced hemoglobin content; 3, hypothyroidism: mostly caused by thyroiditis or post-thyroidectomy, the patient may also be accompanied by fear of cold, bradycardia, mucinous edema, thyroid function tests may indicate a decrease in T3, T4, and an increase in TSH; 4, anxiety and depression: mostly seen in female patients, may also be accompanied by irritability, restlessness, depressed mood, and a lack of awareness of things around them. It may also be accompanied by symptoms such as irritability, restlessness, depressed mood, and reduced interest in surrounding things.