A deviated septum, which occurs when the tissue separating the nostrils is crooked, can lead to snoring and breathing difficulties during sleep by restricting airflow. Symptoms of a deviated septum include nasal congestion, sinus inflammation, and potentially sleep apnea, with surgery (septoplasty) being the main treatment option for severe cases. Consult an ENT specialist for evaluation and possible surgical solutions if snoring persists due to a deviated septum.