Thirst and water intake during fever are normal reactions of the body. In fever, the collective heat production increases, resulting in the loss of water and electrolytes in the body. In this case, it is recommended to replenish water and electrolytes in a timely manner, and electrolytes can be replenished through oral rehydration salts. It is also important to take appropriate treatment measures to address the cause of fever. In clinical practice, the causes of fever include infectious or non-infectious factors.