The hazards of smelling too much nitric acid are as follows: damage to skin and mucous membrane, damage to blood system, and influence on liver and kidney function. 1. Skin, mucous membrane damage: nitric acid can be decomposed into a corrosive gas with asphyxiation, and its contact with the skin can cause skin burns; when it enters the mouth, trachea, can cause stomatitis, tracheal mucosal damage, can induce bronchitis and other diseases, and chest pain, coughing, choking, etc.; when it enters the gastrointestinal tract, can cause gastroenteritis, resulting in abdominal pain, diarrhea and so on. 2. Damage to blood system: it can destroy platelets and may cause blood flow after injury. 3. Damage to the liver and kidneys: it can lead to the failure of liver and kidney functions, resulting in the occurrence of shock. It is important to note that when exposed to nitric acid, you should immediately remove yourself from the scene and wash your eyes or skin and rinse your mouth with water to prevent damage to the body.