The main harms of a deviated nasal septum include several points, mainly causing uncomfortable symptoms. Firstly, the most common symptom is nasal congestion, which is often unilateral, meaning one side of the nose is blocked depending on the side the septum is deviated towards while the other side remains relatively normal. Severe deviation to one side can cause blocked sensation in the nose, or it can affect both sides leading to bilateral congestion. The type of deviation, such as a simple deviation or an S-shaped one where both the front and back are deviated in different directions, can result in blockage in both nasal passages. Another issue is nosebleeds. Sometimes, the deviated septum can form a sharp edge, making the nasal mucosa fragile or piercing other areas, which can easily cause bleeding. Additionally, it can cause headaches due to the pressure exerted on the concha of the opposite side by the deviated septum. It also leads to conditions like rhinitis and sinusitis because the deviation affects the drainage of the nasal cavities and sinuses, resulting in secondary sinusitis, which causes long-term headaches, discomfort, and a series of sinusitis symptoms.