If you are in the formaldehyde content exceeds the standard indoor, inhalation of excessive formaldehyde, can be headache, coughing, sneezing, tearing as the first manifestation of burning pain in the eyes and respiratory tract, and in severe cases may lead to laryngeal edema. Not necessarily headache is formaldehyde poisoning, because the clinical causes of headache is very much, common primary headache, such as migraine, vascular neurological headache and tension headache, often because of fatigue, sleep deprivation, mental stress, anxiety and fire and other triggers. In addition, headaches can also be seen in systemic diseases, such as colds, pneumonia, influenza and other fever-induced headaches. It can also be seen in intracranial occupational diseases, such as intracranial tumors, meningiomas and so on.