How long after moving in does formaldehyde poisoning usually cause symptoms?

The onset time of formaldehyde poisoning symptoms depends on several factors. The latency period and the time when symptoms appear mainly depend on the exposure concentration, duration, and individual sensitivity. In environments with high formaldehyde concentrations, acute irritation symptoms such as eye pain, sore throat, coughing, and difficulty breathing may appear within minutes to several hours. In contrast, prolonged exposure to low concentrations of formaldehyde may lead to symptoms developing gradually over days or weeks. This may progressively cause chronic health issues, including persistent respiratory tract irritation, allergic reactions, weakened immune system function, and even an increased risk of certain cancers. Individual health status, metabolic capacity, and sensitivity also influence the onset time of formaldehyde poisoning symptoms. People with poor health or heightened sensitivity may exhibit symptoms earlier. Different individuals have varying degrees of sensitivity to formaldehyde. Children, pregnant women, the elderly, and individuals with asthma or chronic lung diseases are particularly vulnerable. The onset time of formaldehyde poisoning symptoms varies among individuals, but reactions generally occur within half an hour to several weeks. It is recommended that after new interior renovations or purchasing new furniture, adequate indoor ventilation should be ensured and air purifiers should be used to prevent formaldehyde poisoning. If formaldehyde poisoning occurs, seek medical attention promptly.