Formaldehyde in the body can not be detected by routine blood tests.
Formaldehyde poisoning will have respiratory tract irritation symptoms, such as sore throat, cough, hoarseness, but also photophobia, tearing, conjunctival congestion. Acute formaldehyde poisoning can be examined by taking a chest X-ray, and found that the lung texture is blurred, increased or small patchy shadows or pulmonary edema manifestations.
Routine blood tests mainly look at platelets, red blood cells, white blood cells and other indicators, formaldehyde generally does not affect blood cells.
So when in the new living environment, if there is dizziness, nausea, throat irritation, chest tightness, suspected formaldehyde poisoning, you need to go to the hospital to take a film to check.