Why does bleach cause a person to become ill?

Bleach can cause illness due to its corrosive and toxic properties. Ingesting or inhaling bleach can lead to irritation of the respiratory system, throat, and stomach, resulting in symptoms like coughing, nausea, and vomiting. Prolonged exposure can damage internal organs and tissues, leading to more severe health issues. Additionally, mixing bleach with other household chemicals can produce harmful gases, further increasing health risks.