Snoring is caused by the vibration of the soft tissues in the back of your throat, which can occur due to several reasons, including: Obstruction of the airway: This can be caused by obesity, the tongue or tonsils blocking the airway, or a deviated septum. Alcohol and sedatives: Alcohol and sedatives can relax the muscles in the throat and lead to snoring. Nasal congestion: If you have a stuffy nose, it can be harder to breathe through your nose while you sleep, leading to snoring. Sleep position: Sleeping on your back can cause your tongue and soft palate to fall to the back of your throat and block the airway, leading to snoring. Aging: As you age, the muscles in your throat can weaken, leading to snoring. Medical conditions: Snoring can be a symptom of medical conditions such as sleep apnea, hypothyroidism, and allergies. These are some of the common causes of snoring. If your snoring is persistent and disruptive, it's important to see a doctor to rule out any underlying medical conditions.