What happens if formaldehyde levels exceed the standard? Click to find out now!

Formaldehyde levels exceeding the standard can range from mild discomfort like dizziness to serious health risks, including cancer. Specifically, it poses the following hazards to the body:

1 – Irritation symptoms affecting the eyes and respiratory tract mucosa

If the formaldehyde concentration in the air exceeds the national hygiene standards, it can pose varying degrees of health risks to humans. Prolonged exposure to low levels of formaldehyde typically leads to symptoms such as tearing, sneezing, and coughing, and may even result in conditions like conjunctivitis and rhinitis.

These include: ① Toxic respiratory disease. Prolonged and repeated inhalation of irritant gases can lead to irritation of the respiratory tract mucosa, causing symptoms such as dry and itchy nose, dry and sore throat, cough with phlegm, and occasionally chest tightness or even blood-tinged sputum. ② Eye disorders. Formaldehyde can strongly irritate the eyes, leading to symptoms such as conjunctival redness, eye pain, and tearing.

2. Effects on the Immune System

Currently, ample evidence has confirmed that formaldehyde can affect multiple components of the human immune system—either directly or indirectly—leading to immune dysfunction. The human immune system not only serves as a critical barrier against pathogenic microorganisms but also plays a vital role in maintaining the body's internal homeostasis.

In the short term, formaldehyde can impair the immune system, leading to immune damage and dysfunction, which may result in recurrent colds, fever, and other related symptoms.

3 , Damage to the liver

Cells and the liver may be the initial target organs for formaldehyde entering the bloodstream. Formaldehyde is primarily metabolized by the liver and excreted through the kidneys. If the body accumulates more formaldehyde than the liver can detoxify, it can lead to liver damage.

There have been several reports from abroad of acute toxic hepatitis occurring in buildings constructed with formaldehyde-based building materials. Although research on its liver toxicity remains limited, formaldehyde has indeed been confirmed to pose a potential risk to human liver health.

4 • Effects on the skin

It primarily causes contact dermatitis and mucosal irritation symptoms. Formaldehyde can directly irritate the skin upon exposure in the air, leading to dermatitis, skin redness, severe pain, cracking, and blistering reactions. Repeated exposure may result in nail softening and dark brown discoloration.

Under occupational exposure conditions, formaldehyde is a major cause of skin damage among workers. A study conducted in Poland revealed that among diagnosed cases of occupational skin diseases, the most common types were occupational, allergic, and contact dermatitis. (Occupational allergic contact dermatitis ， OACD) Occupied 95% The proportion, and among these OACD Among them, there is 18.1% It is caused by formaldehyde, and this proportion is still increasing.

5 • Effects on the Nervous and Endocrine Systems

Frequent exposure to formaldehyde can lead to symptoms such as hand tremors, excessive sweating of the palms, numbness in the limbs, and reduced tactile sensitivity in the fingertips. Long-term exposure to even low doses may also cause menstrual irregularities in women.

Additionally, formaldehyde is classified as a neurotoxin. Studies have shown that it can induce degenerative necrosis of the nervous system. DNA 、 RNA Synthesis reduction observed. Studies of personnel who have been engaged in anatomical work for extended periods reveal that their memory, sensory perception, balance, and coordination abilities have all declined to varying degrees. Additionally, individuals with prolonged exposure to formaldehyde may experience symptoms such as headaches, memory impairment, and sleep disturbances—ranging in severity depending on the level of exposure.

6 – Mutagenic and Carcinogenic Effects

2004 Formaldehyde was classified by the International Agency for Research on Cancer (IARC) Confirmed as 1 Classified as a carcinogen. Experiments show that it can covalently bind to DNA Upward, it manifests as a single strand. DNA Deletion can also induce dominant lethal mutations in mice.

Experts believe there is sufficient evidence to show that formaldehyde can cause nasopharyngeal cancer in humans, a type of cancer relatively rare in developed countries. Additionally, while the evidence linking formaldehyde to nasal cavity and sinus cancers is less conclusive, there is strong evidence indicating that formaldehyde may increase the risk of leukemia.

Happiness DaDa: Although formaldehyde poses numerous risks, there’s no need to be alarmed—once we identify it, we can effectively eliminate it. Follow the "Happiness Assessment" official account, and we’ll share more valuable insights about formaldehyde with you!