There are many diseases that cause dizziness and weakness in the limbs. The common ones are as follows: 1. colds. Patients often feel headache, dizziness, and weakness of limbs when they have a cold. 2. Hypertension. When hypertension occurs, patients often feel headache, dizziness, general fatigue, and weakness of the limbs. 3, anemia. In moderate to severe anemia, due to the low hemoglobin content in the body, the ability to carry oxygen is poor and cannot meet the normal needs of the body, often feeling dizzy, dull and weak in the limbs. 4. Hypoglycemia. When hypoglycemia occurs, patients often show dizziness, sweating, and weakness of limbs. 5. Sleep disorders. Patients with sleep disorders often feel dizzy and weak in the limbs due to poor sleep quality at night or too little sleep quality time, and the brain does not get enough rest the next day. 6. Depression. In addition to depressed mood and slow thinking, patients are often accompanied by some somatic symptoms. These somatic symptoms are mostly manifested as dizziness, lightheadedness, fatigue and soreness of the limbs.