The baby’s voice overnight may be acute laryngitis or dry air and other conditions lead to, can be medication, supplemental hydration, etc. to alleviate. 1. Acute laryngitis: infection caused by acute laryngitis may lead to a baby mute overnight, it is recommended to seek medical advice, follow the doctor’s instructions to use hormone nebulizer inhalation therapy, inhibit laryngeal edema, while according to the infection, the use of penicillin, ceftriaxone and other antibiotics. 2. Dry environment: If the indoor air is dry, the baby has obvious nasal congestion, open-mouth breathing, there may also be a baby mute voice overnight, try to let the baby drink more water, the indoor air should not be too dry, pay attention to keep the air humidity and so on. There may be other reasons why a baby’s voice goes mute overnight, so it is advisable to go to the hospital in a timely manner to clarify the cause of the illness and target treatment. If you need to use medication, you need to use it under the guidance of a doctor.