Swelling and pain in the bridge of the nose may be caused by trauma, nasal necrotizing granulomatous vasculitis, folliculitis and other factors. 1. Trauma: If the bridge of the nose is accidentally hit by violence, it may lead to local soft tissue contusion, which may cause localized swelling, bleeding, pain and other symptoms in the bridge of the nose. 2. Nasal necrotizing granulomatous vasculitis: the cause of this disease is unknown, and it is an autoimmune disease that can involve multiple systems throughout the body. It is often characterized by nasal congestion, nasal distension, nasal bleeding, etc. In severe cases, nasal septum penetration may occur. In severe cases, there may be perforation of the nasal septum, destruction of the nasal bone, saddle nose, producing symptoms of swelling and pain in the bridge of the nose. 3. Folliculitis: If the hair follicles in the bridge of the nose are infected by bacteria, inflammation may result in the formation of red, swollen, itchy or painful patches and pustules around the hair follicles, and in severe cases, permanent skin damage such as scarring may be left. If the swelling and pain on the bridge of the nose is severe or recurring, you should seek prompt medical attention and systematic examination for a clear diagnosis.