Sleep deprivation can worsen the flu since it weakens your immune system. In fact, people typically need more sleep to help fight the virus. "Get as much sleep as your body needs," Dr. Milstone said. Unless you're super lethargic (which could indicate that the infection is getting worse), "there's no such thing as too much sleep when you're sick," he explained.
Dr. Greenblatt suggests running a humidifier to help keep your airways clear and ease your symptoms. "Most illnesses that produce a lot of coughing can interfere with your sleep," she said. "To help keep those secretions under control, it really helps to stay hydrated."