Exposure to harmful monomers can result in a range of health problems. For instance, acrylonitrile is known to cause skin irritation and respiratory issues upon inhalation. Chronic exposure to styrene can affect the central nervous system, causing symptoms such as headaches and dizziness. Vinyl chloride is a known carcinogen, linked to liver cancer, while formaldehyde exposure can result in respiratory problems and is also classified as a carcinogen.