In mild formaldehyde poisoning, if the formaldehyde in the body is completely metabolized and return to normal, the recovery time will be different according to each person’s physical condition. If it is a young person, the body is relatively strong, there is no underlying disease or chronic disease, within 2 days, formaldehyde in the body can be completely metabolized, can be very good recovery. However, if there are underlying diseases, such as hypertension, diabetes, chronic respiratory diseases, and liver and kidney insufficiency, the metabolism is relatively slow, and it may take a week for formaldehyde to be completely metabolized. If the patient has insufficient liver and kidney or the patient has liver and kidney failure, the patient may not be able to recover completely, it is recommended to go to the hospital for examination and treatment.