Secondhand can cause. choose the all ply. three points. I irritation, headaches, coughing or sneezing.

1. Irritation: Secondhand smoke can cause irritation to the eyes, nose, throat, and respiratory system. Breathing in the smoke can lead to redness, itching, and discomfort in these areas. This irritation can be particularly problematic for individuals with pre-existing respiratory conditions such as asthma.

2. Headaches: Exposure to secondhand smoke has been linked to an increased risk of headaches. The chemicals present in the smoke can trigger headaches in susceptible individuals. These headaches can range from mild to severe and can significantly impact a person's daily life and well-being.

3. Coughing or sneezing: Inhaling secondhand smoke can trigger coughing or sneezing episodes, even in individuals who do not have any pre-existing respiratory conditions. The smoke irritates the airways, leading to a reflex response of coughing or sneezing as a way to clear the irritation. This can be particularly bothersome and disruptive, especially in enclosed spaces with poor ventilation.

It is important to note that these symptoms can vary in severity depending on the individual's level of exposure, sensitivity, and overall health. However, prolonged exposure to secondhand smoke can have cumulative harmful effects on both short-term and long-term health.